./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label05.c -s /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/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 57986f5df1647173a809f7445e253a7d11975932 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 19:17:02,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 19:17:02,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 19:17:02,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 19:17:02,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 19:17:02,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 19:17:02,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 19:17:02,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 19:17:02,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 19:17:02,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 19:17:02,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 19:17:02,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 19:17:02,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 19:17:02,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 19:17:02,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 19:17:02,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 19:17:02,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 19:17:02,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 19:17:02,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 19:17:02,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 19:17:02,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 19:17:02,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 19:17:02,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 19:17:02,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 19:17:02,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 19:17:02,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 19:17:02,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 19:17:02,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 19:17:02,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 19:17:02,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 19:17:02,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 19:17:02,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 19:17:02,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 19:17:02,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 19:17:02,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 19:17:02,220 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 19:17:02,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 19:17:02,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 19:17:02,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 19:17:02,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 19:17:02,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 19:17:02,223 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 19:17:02,247 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 19:17:02,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 19:17:02,248 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 19:17:02,248 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 19:17:02,248 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 19:17:02,248 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 19:17:02,248 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 19:17:02,249 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 19:17:02,249 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 19:17:02,249 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 19:17:02,249 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 19:17:02,249 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 19:17:02,249 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 19:17:02,250 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 19:17:02,250 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 19:17:02,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 19:17:02,250 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 19:17:02,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 19:17:02,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 19:17:02,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 19:17:02,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 19:17:02,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 19:17:02,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 19:17:02,251 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 19:17:02,251 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 19:17:02,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 19:17:02,251 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 19:17:02,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 19:17:02,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 19:17:02,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 19:17:02,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:17:02,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 19:17:02,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 19:17:02,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 19:17:02,252 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 19:17:02,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 19:17:02,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 19:17:02,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 19:17:02,253 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 19:17:02,253 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_61696005-86d4-4040-8018-fb1fddea9327/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57986f5df1647173a809f7445e253a7d11975932 [2020-12-09 19:17:02,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 19:17:02,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 19:17:02,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 19:17:02,451 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 19:17:02,452 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 19:17:02,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label05.c [2020-12-09 19:17:02,492 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/bin/utaipan/data/432a89307/98718e60332a47ed8ab786e2f93c70f6/FLAGe8decfac7 [2020-12-09 19:17:02,897 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 19:17:02,897 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/sv-benchmarks/c/eca-rers2012/Problem01_label05.c [2020-12-09 19:17:02,907 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/bin/utaipan/data/432a89307/98718e60332a47ed8ab786e2f93c70f6/FLAGe8decfac7 [2020-12-09 19:17:03,292 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/bin/utaipan/data/432a89307/98718e60332a47ed8ab786e2f93c70f6 [2020-12-09 19:17:03,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 19:17:03,300 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 19:17:03,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 19:17:03,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 19:17:03,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 19:17:03,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:17:03" (1/1) ... [2020-12-09 19:17:03,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cc009cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:03, skipping insertion in model container [2020-12-09 19:17:03,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:17:03" (1/1) ... [2020-12-09 19:17:03,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 19:17:03,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 19:17:03,608 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/sv-benchmarks/c/eca-rers2012/Problem01_label05.c[17240,17253] [2020-12-09 19:17:03,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:17:03,642 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 19:17:03,721 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/sv-benchmarks/c/eca-rers2012/Problem01_label05.c[17240,17253] [2020-12-09 19:17:03,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:17:03,753 INFO L208 MainTranslator]: Completed translation [2020-12-09 19:17:03,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:03 WrapperNode [2020-12-09 19:17:03,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 19:17:03,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 19:17:03,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 19:17:03,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 19:17:03,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:03" (1/1) ... [2020-12-09 19:17:03,779 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:03" (1/1) ... [2020-12-09 19:17:03,821 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 19:17:03,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 19:17:03,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 19:17:03,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 19:17:03,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:03" (1/1) ... [2020-12-09 19:17:03,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:03" (1/1) ... [2020-12-09 19:17:03,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:03" (1/1) ... [2020-12-09 19:17:03,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:03" (1/1) ... [2020-12-09 19:17:03,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:03" (1/1) ... [2020-12-09 19:17:03,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:03" (1/1) ... [2020-12-09 19:17:03,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:03" (1/1) ... [2020-12-09 19:17:03,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 19:17:03,880 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 19:17:03,880 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 19:17:03,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 19:17:03,881 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/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 [2020-12-09 19:17:03,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 19:17:03,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 19:17:03,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 19:17:03,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 19:17:05,155 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 19:17:05,155 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 19:17:05,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:17:05 BoogieIcfgContainer [2020-12-09 19:17:05,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 19:17:05,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 19:17:05,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 19:17:05,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 19:17:05,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:17:03" (1/3) ... [2020-12-09 19:17:05,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238f2fdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:17:05, skipping insertion in model container [2020-12-09 19:17:05,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:03" (2/3) ... [2020-12-09 19:17:05,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238f2fdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:17:05, skipping insertion in model container [2020-12-09 19:17:05,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:17:05" (3/3) ... [2020-12-09 19:17:05,165 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label05.c [2020-12-09 19:17:05,174 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 19:17:05,177 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 19:17:05,184 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 19:17:05,201 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 19:17:05,201 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 19:17:05,201 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 19:17:05,201 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 19:17:05,201 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 19:17:05,201 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 19:17:05,201 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 19:17:05,201 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 19:17:05,211 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-12-09 19:17:05,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-09 19:17:05,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:05,218 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] [2020-12-09 19:17:05,218 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:17:05,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:05,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1323238297, now seen corresponding path program 1 times [2020-12-09 19:17:05,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:05,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314363924] [2020-12-09 19:17:05,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:17:05,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314363924] [2020-12-09 19:17:05,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:05,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:17:05,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60753107] [2020-12-09 19:17:05,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:17:05,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:05,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:17:05,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:17:05,483 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-12-09 19:17:05,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:05,794 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-12-09 19:17:05,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:17:05,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-09 19:17:05,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:05,804 INFO L225 Difference]: With dead ends: 224 [2020-12-09 19:17:05,804 INFO L226 Difference]: Without dead ends: 145 [2020-12-09 19:17:05,807 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 [2020-12-09 19:17:05,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-09 19:17:05,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-12-09 19:17:05,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-09 19:17:05,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2020-12-09 19:17:05,850 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2020-12-09 19:17:05,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:05,851 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2020-12-09 19:17:05,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:17:05,851 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2020-12-09 19:17:05,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-09 19:17:05,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:05,855 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] [2020-12-09 19:17:05,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 19:17:05,855 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:17:05,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:05,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1048390918, now seen corresponding path program 1 times [2020-12-09 19:17:05,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:05,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171550432] [2020-12-09 19:17:05,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:17:05,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171550432] [2020-12-09 19:17:05,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:05,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:17:05,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074496119] [2020-12-09 19:17:05,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:17:05,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:05,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:17:05,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:17:05,919 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2020-12-09 19:17:06,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:06,196 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2020-12-09 19:17:06,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:17:06,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-09 19:17:06,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:06,199 INFO L225 Difference]: With dead ends: 431 [2020-12-09 19:17:06,199 INFO L226 Difference]: Without dead ends: 287 [2020-12-09 19:17:06,200 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 [2020-12-09 19:17:06,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-12-09 19:17:06,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-12-09 19:17:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-09 19:17:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 467 transitions. [2020-12-09 19:17:06,217 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 467 transitions. Word has length 77 [2020-12-09 19:17:06,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:06,217 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 467 transitions. [2020-12-09 19:17:06,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:17:06,218 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 467 transitions. [2020-12-09 19:17:06,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-09 19:17:06,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:06,220 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-12-09 19:17:06,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 19:17:06,220 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:17:06,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:06,221 INFO L82 PathProgramCache]: Analyzing trace with hash 466073045, now seen corresponding path program 1 times [2020-12-09 19:17:06,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:06,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381155698] [2020-12-09 19:17:06,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:17:06,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381155698] [2020-12-09 19:17:06,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:06,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 19:17:06,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694777590] [2020-12-09 19:17:06,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 19:17:06,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:06,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 19:17:06,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 19:17:06,309 INFO L87 Difference]: Start difference. First operand 287 states and 467 transitions. Second operand 4 states. [2020-12-09 19:17:06,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:06,683 INFO L93 Difference]: Finished difference Result 715 states and 1141 transitions. [2020-12-09 19:17:06,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 19:17:06,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-12-09 19:17:06,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:06,686 INFO L225 Difference]: With dead ends: 715 [2020-12-09 19:17:06,686 INFO L226 Difference]: Without dead ends: 429 [2020-12-09 19:17:06,688 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 [2020-12-09 19:17:06,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-12-09 19:17:06,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2020-12-09 19:17:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-12-09 19:17:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 639 transitions. [2020-12-09 19:17:06,709 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 639 transitions. Word has length 105 [2020-12-09 19:17:06,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:06,710 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 639 transitions. [2020-12-09 19:17:06,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 19:17:06,710 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 639 transitions. [2020-12-09 19:17:06,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-09 19:17:06,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:06,714 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2020-12-09 19:17:06,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 19:17:06,714 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:17:06,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:06,715 INFO L82 PathProgramCache]: Analyzing trace with hash -343775073, now seen corresponding path program 1 times [2020-12-09 19:17:06,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:06,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594319227] [2020-12-09 19:17:06,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-09 19:17:06,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594319227] [2020-12-09 19:17:06,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:06,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:17:06,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545414448] [2020-12-09 19:17:06,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:17:06,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:06,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:17:06,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:17:06,797 INFO L87 Difference]: Start difference. First operand 429 states and 639 transitions. Second operand 3 states. [2020-12-09 19:17:07,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:07,029 INFO L93 Difference]: Finished difference Result 999 states and 1479 transitions. [2020-12-09 19:17:07,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:17:07,030 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 109 [2020-12-09 19:17:07,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:07,033 INFO L225 Difference]: With dead ends: 999 [2020-12-09 19:17:07,034 INFO L226 Difference]: Without dead ends: 571 [2020-12-09 19:17:07,034 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 [2020-12-09 19:17:07,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-12-09 19:17:07,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 429. [2020-12-09 19:17:07,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-12-09 19:17:07,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 627 transitions. [2020-12-09 19:17:07,045 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 627 transitions. Word has length 109 [2020-12-09 19:17:07,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:07,045 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 627 transitions. [2020-12-09 19:17:07,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:17:07,045 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 627 transitions. [2020-12-09 19:17:07,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-09 19:17:07,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:07,047 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2020-12-09 19:17:07,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 19:17:07,047 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:17:07,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:07,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1189641001, now seen corresponding path program 1 times [2020-12-09 19:17:07,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:07,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123740872] [2020-12-09 19:17:07,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-09 19:17:07,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123740872] [2020-12-09 19:17:07,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:07,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:17:07,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022288395] [2020-12-09 19:17:07,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:17:07,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:07,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:17:07,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:17:07,093 INFO L87 Difference]: Start difference. First operand 429 states and 627 transitions. Second operand 3 states. [2020-12-09 19:17:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:07,343 INFO L93 Difference]: Finished difference Result 1070 states and 1538 transitions. [2020-12-09 19:17:07,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:17:07,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-09 19:17:07,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:07,347 INFO L225 Difference]: With dead ends: 1070 [2020-12-09 19:17:07,347 INFO L226 Difference]: Without dead ends: 571 [2020-12-09 19:17:07,348 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 [2020-12-09 19:17:07,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-12-09 19:17:07,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2020-12-09 19:17:07,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-12-09 19:17:07,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 711 transitions. [2020-12-09 19:17:07,364 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 711 transitions. Word has length 113 [2020-12-09 19:17:07,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:07,364 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 711 transitions. [2020-12-09 19:17:07,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:17:07,364 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 711 transitions. [2020-12-09 19:17:07,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-09 19:17:07,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:07,366 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1] [2020-12-09 19:17:07,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 19:17:07,367 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:17:07,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:07,367 INFO L82 PathProgramCache]: Analyzing trace with hash 2049384661, now seen corresponding path program 1 times [2020-12-09 19:17:07,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:07,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964132948] [2020-12-09 19:17:07,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-09 19:17:07,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964132948] [2020-12-09 19:17:07,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:07,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 19:17:07,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208541706] [2020-12-09 19:17:07,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:17:07,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:07,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:17:07,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:17:07,410 INFO L87 Difference]: Start difference. First operand 571 states and 711 transitions. Second operand 3 states. [2020-12-09 19:17:07,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:07,667 INFO L93 Difference]: Finished difference Result 1496 states and 1860 transitions. [2020-12-09 19:17:07,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:17:07,667 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-12-09 19:17:07,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:07,671 INFO L225 Difference]: With dead ends: 1496 [2020-12-09 19:17:07,671 INFO L226 Difference]: Without dead ends: 926 [2020-12-09 19:17:07,672 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 [2020-12-09 19:17:07,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-12-09 19:17:07,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 713. [2020-12-09 19:17:07,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-12-09 19:17:07,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 889 transitions. [2020-12-09 19:17:07,686 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 889 transitions. Word has length 122 [2020-12-09 19:17:07,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:07,686 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 889 transitions. [2020-12-09 19:17:07,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:17:07,686 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 889 transitions. [2020-12-09 19:17:07,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-09 19:17:07,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:07,688 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:17:07,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 19:17:07,688 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:17:07,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:07,688 INFO L82 PathProgramCache]: Analyzing trace with hash 54762715, now seen corresponding path program 1 times [2020-12-09 19:17:07,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:07,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022098700] [2020-12-09 19:17:07,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-09 19:17:07,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022098700] [2020-12-09 19:17:07,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:07,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:17:07,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379212079] [2020-12-09 19:17:07,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:17:07,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:07,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:17:07,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:17:07,754 INFO L87 Difference]: Start difference. First operand 713 states and 889 transitions. Second operand 3 states. [2020-12-09 19:17:08,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:08,004 INFO L93 Difference]: Finished difference Result 1567 states and 1960 transitions. [2020-12-09 19:17:08,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:17:08,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-09 19:17:08,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:08,009 INFO L225 Difference]: With dead ends: 1567 [2020-12-09 19:17:08,009 INFO L226 Difference]: Without dead ends: 855 [2020-12-09 19:17:08,011 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 [2020-12-09 19:17:08,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2020-12-09 19:17:08,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 855. [2020-12-09 19:17:08,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 855 states. [2020-12-09 19:17:08,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1056 transitions. [2020-12-09 19:17:08,033 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1056 transitions. Word has length 138 [2020-12-09 19:17:08,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:08,033 INFO L481 AbstractCegarLoop]: Abstraction has 855 states and 1056 transitions. [2020-12-09 19:17:08,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:17:08,034 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1056 transitions. [2020-12-09 19:17:08,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-09 19:17:08,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:08,037 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:17:08,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 19:17:08,037 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:17:08,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:08,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1875516027, now seen corresponding path program 1 times [2020-12-09 19:17:08,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:08,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223214060] [2020-12-09 19:17:08,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:08,131 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 78 proven. 3 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-12-09 19:17:08,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223214060] [2020-12-09 19:17:08,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062956486] [2020-12-09 19:17:08,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/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 [2020-12-09 19:17:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:08,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 19:17:08,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:17:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-09 19:17:08,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:17:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-09 19:17:08,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 19:17:08,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2020-12-09 19:17:08,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351045723] [2020-12-09 19:17:08,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:17:08,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:08,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:17:08,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:17:08,516 INFO L87 Difference]: Start difference. First operand 855 states and 1056 transitions. Second operand 3 states. [2020-12-09 19:17:08,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:08,744 INFO L93 Difference]: Finished difference Result 1922 states and 2402 transitions. [2020-12-09 19:17:08,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:17:08,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2020-12-09 19:17:08,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:08,751 INFO L225 Difference]: With dead ends: 1922 [2020-12-09 19:17:08,751 INFO L226 Difference]: Without dead ends: 1068 [2020-12-09 19:17:08,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 305 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:17:08,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2020-12-09 19:17:08,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 997. [2020-12-09 19:17:08,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-12-09 19:17:08,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1216 transitions. [2020-12-09 19:17:08,778 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1216 transitions. Word has length 154 [2020-12-09 19:17:08,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:08,778 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1216 transitions. [2020-12-09 19:17:08,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:17:08,778 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1216 transitions. [2020-12-09 19:17:08,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-09 19:17:08,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:08,781 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:17:08,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-09 19:17:08,982 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:17:08,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:08,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1492490122, now seen corresponding path program 1 times [2020-12-09 19:17:08,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:08,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055049919] [2020-12-09 19:17:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:09,094 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 78 proven. 3 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-12-09 19:17:09,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055049919] [2020-12-09 19:17:09,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155576613] [2020-12-09 19:17:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/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 [2020-12-09 19:17:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:09,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 19:17:09,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:17:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-12-09 19:17:09,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:17:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-12-09 19:17:09,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 19:17:09,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2020-12-09 19:17:09,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117946990] [2020-12-09 19:17:09,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:17:09,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:09,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:17:09,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:17:09,415 INFO L87 Difference]: Start difference. First operand 997 states and 1216 transitions. Second operand 3 states. [2020-12-09 19:17:09,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:09,609 INFO L93 Difference]: Finished difference Result 2277 states and 2801 transitions. [2020-12-09 19:17:09,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:17:09,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-09 19:17:09,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:09,615 INFO L225 Difference]: With dead ends: 2277 [2020-12-09 19:17:09,615 INFO L226 Difference]: Without dead ends: 1281 [2020-12-09 19:17:09,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:17:09,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-12-09 19:17:09,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1139. [2020-12-09 19:17:09,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-12-09 19:17:09,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1393 transitions. [2020-12-09 19:17:09,640 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1393 transitions. Word has length 160 [2020-12-09 19:17:09,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:09,641 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1393 transitions. [2020-12-09 19:17:09,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:17:09,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1393 transitions. [2020-12-09 19:17:09,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-09 19:17:09,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:09,645 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:17:09,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:17:09,845 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:17:09,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:09,846 INFO L82 PathProgramCache]: Analyzing trace with hash -664622582, now seen corresponding path program 1 times [2020-12-09 19:17:09,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:09,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224364966] [2020-12-09 19:17:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 108 proven. 3 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-09 19:17:09,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224364966] [2020-12-09 19:17:09,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331970461] [2020-12-09 19:17:09,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/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 [2020-12-09 19:17:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:10,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 19:17:10,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:17:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-09 19:17:10,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:17:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-09 19:17:10,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 19:17:10,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2020-12-09 19:17:10,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208699113] [2020-12-09 19:17:10,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:17:10,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:10,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:17:10,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:17:10,192 INFO L87 Difference]: Start difference. First operand 1139 states and 1393 transitions. Second operand 3 states. [2020-12-09 19:17:10,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:10,385 INFO L93 Difference]: Finished difference Result 2703 states and 3289 transitions. [2020-12-09 19:17:10,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:17:10,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 181 [2020-12-09 19:17:10,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:10,391 INFO L225 Difference]: With dead ends: 2703 [2020-12-09 19:17:10,391 INFO L226 Difference]: Without dead ends: 1565 [2020-12-09 19:17:10,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 359 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:17:10,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2020-12-09 19:17:10,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1494. [2020-12-09 19:17:10,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1494 states. [2020-12-09 19:17:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1796 transitions. [2020-12-09 19:17:10,422 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1796 transitions. Word has length 181 [2020-12-09 19:17:10,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:10,423 INFO L481 AbstractCegarLoop]: Abstraction has 1494 states and 1796 transitions. [2020-12-09 19:17:10,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:17:10,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1796 transitions. [2020-12-09 19:17:10,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-12-09 19:17:10,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:10,428 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:17:10,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-09 19:17:10,629 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:17:10,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:10,630 INFO L82 PathProgramCache]: Analyzing trace with hash 455721236, now seen corresponding path program 1 times [2020-12-09 19:17:10,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:10,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839229057] [2020-12-09 19:17:10,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:10,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 94 proven. 3 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-12-09 19:17:10,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839229057] [2020-12-09 19:17:10,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478260933] [2020-12-09 19:17:10,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:17:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:10,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 19:17:10,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:17:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-09 19:17:10,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:17:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-09 19:17:10,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 19:17:10,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2020-12-09 19:17:10,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141352452] [2020-12-09 19:17:11,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:17:11,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:11,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:17:11,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:17:11,000 INFO L87 Difference]: Start difference. First operand 1494 states and 1796 transitions. Second operand 3 states. [2020-12-09 19:17:11,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:11,188 INFO L93 Difference]: Finished difference Result 3271 states and 3928 transitions. [2020-12-09 19:17:11,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:17:11,188 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 200 [2020-12-09 19:17:11,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:11,194 INFO L225 Difference]: With dead ends: 3271 [2020-12-09 19:17:11,194 INFO L226 Difference]: Without dead ends: 1778 [2020-12-09 19:17:11,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 397 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:17:11,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2020-12-09 19:17:11,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1494. [2020-12-09 19:17:11,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1494 states. [2020-12-09 19:17:11,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1796 transitions. [2020-12-09 19:17:11,225 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1796 transitions. Word has length 200 [2020-12-09 19:17:11,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:11,226 INFO L481 AbstractCegarLoop]: Abstraction has 1494 states and 1796 transitions. [2020-12-09 19:17:11,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:17:11,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1796 transitions. [2020-12-09 19:17:11,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-09 19:17:11,231 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:11,231 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:17:11,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:17:11,432 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:17:11,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:11,432 INFO L82 PathProgramCache]: Analyzing trace with hash -143505842, now seen corresponding path program 1 times [2020-12-09 19:17:11,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:11,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703662215] [2020-12-09 19:17:11,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 127 proven. 3 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-12-09 19:17:11,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703662215] [2020-12-09 19:17:11,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916135956] [2020-12-09 19:17:11,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:17:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:11,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 19:17:11,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:17:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-12-09 19:17:11,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:17:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-12-09 19:17:11,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 19:17:11,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2020-12-09 19:17:11,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479707940] [2020-12-09 19:17:11,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 19:17:11,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:11,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 19:17:11,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 19:17:11,964 INFO L87 Difference]: Start difference. First operand 1494 states and 1796 transitions. Second operand 4 states. [2020-12-09 19:17:12,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:12,295 INFO L93 Difference]: Finished difference Result 2701 states and 3206 transitions. [2020-12-09 19:17:12,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 19:17:12,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 212 [2020-12-09 19:17:12,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:12,297 INFO L225 Difference]: With dead ends: 2701 [2020-12-09 19:17:12,297 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 19:17:12,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 19:17:12,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 19:17:12,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 19:17:12,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 19:17:12,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 19:17:12,299 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 212 [2020-12-09 19:17:12,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:12,300 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 19:17:12,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 19:17:12,300 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 19:17:12,300 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 19:17:12,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-09 19:17:12,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 19:17:12,705 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2020-12-09 19:17:12,812 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2020-12-09 19:17:12,814 INFO L262 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-12-09 19:17:12,814 INFO L262 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-12-09 19:17:12,814 INFO L262 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-12-09 19:17:12,814 INFO L262 CegarLoopResult]: For program point L467-1(lines 40 585) no Hoare annotation was computed. [2020-12-09 19:17:12,814 INFO L262 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-12-09 19:17:12,814 INFO L262 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-12-09 19:17:12,814 INFO L262 CegarLoopResult]: For program point L468(line 468) no Hoare annotation was computed. [2020-12-09 19:17:12,814 INFO L262 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-12-09 19:17:12,814 INFO L262 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-12-09 19:17:12,814 INFO L262 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-12-09 19:17:12,814 INFO L262 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-12-09 19:17:12,814 INFO L262 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-12-09 19:17:12,814 INFO L262 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-12-09 19:17:12,815 INFO L262 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-12-09 19:17:12,815 INFO L262 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-12-09 19:17:12,815 INFO L262 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-12-09 19:17:12,815 INFO L262 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-12-09 19:17:12,815 INFO L262 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-12-09 19:17:12,815 INFO L262 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-12-09 19:17:12,815 INFO L262 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-12-09 19:17:12,815 INFO L262 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-12-09 19:17:12,815 INFO L262 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-12-09 19:17:12,815 INFO L262 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-12-09 19:17:12,815 INFO L262 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-12-09 19:17:12,815 INFO L262 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-12-09 19:17:12,815 INFO L262 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-12-09 19:17:12,816 INFO L262 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-12-09 19:17:12,816 INFO L262 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-12-09 19:17:12,816 INFO L262 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-12-09 19:17:12,816 INFO L262 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-12-09 19:17:12,816 INFO L262 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-12-09 19:17:12,816 INFO L262 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-12-09 19:17:12,816 INFO L262 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-12-09 19:17:12,816 INFO L262 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-12-09 19:17:12,816 INFO L262 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-12-09 19:17:12,816 INFO L262 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-12-09 19:17:12,816 INFO L262 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-12-09 19:17:12,816 INFO L262 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-12-09 19:17:12,816 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 19:17:12,816 INFO L262 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-12-09 19:17:12,817 INFO L262 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-12-09 19:17:12,817 INFO L262 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-12-09 19:17:12,817 INFO L258 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse6 (= ~a20~0 1))) (let ((.cse5 (<= ~a7~0 0)) (.cse3 (<= ~a16~0 4)) (.cse1 (<= 15 ~a8~0)) (.cse0 (= ~a21~0 1)) (.cse4 (<= ~a17~0 0)) (.cse8 (not .cse6)) (.cse2 (= ~a17~0 1)) (.cse9 (<= ~a16~0 5)) (.cse7 (<= ~a21~0 0))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse4 .cse5) (and .cse4 .cse6 .cse7) (and .cse0 .cse5 .cse6 .cse2) (and .cse3 .cse6 .cse2) (and .cse4 .cse8 .cse1) (and (<= 14 ~a8~0) .cse0 .cse4 .cse6) (and .cse9 .cse4 .cse8) (and .cse7 .cse6 .cse2) (and .cse9 .cse7)))) [2020-12-09 19:17:12,817 INFO L262 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-12-09 19:17:12,817 INFO L262 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-12-09 19:17:12,817 INFO L262 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-12-09 19:17:12,817 INFO L262 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-12-09 19:17:12,817 INFO L262 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-12-09 19:17:12,818 INFO L262 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-12-09 19:17:12,818 INFO L262 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-12-09 19:17:12,818 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 19:17:12,818 INFO L262 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-12-09 19:17:12,818 INFO L265 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-12-09 19:17:12,818 INFO L262 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-12-09 19:17:12,818 INFO L262 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-12-09 19:17:12,818 INFO L262 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-12-09 19:17:12,818 INFO L262 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-12-09 19:17:12,818 INFO L262 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-12-09 19:17:12,818 INFO L262 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-12-09 19:17:12,818 INFO L262 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-12-09 19:17:12,818 INFO L262 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-12-09 19:17:12,818 INFO L262 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-12-09 19:17:12,818 INFO L262 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-12-09 19:17:12,819 INFO L262 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-12-09 19:17:12,819 INFO L262 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-12-09 19:17:12,819 INFO L262 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-12-09 19:17:12,819 INFO L258 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse6 (= ~a20~0 1))) (let ((.cse5 (<= ~a7~0 0)) (.cse3 (<= ~a16~0 4)) (.cse1 (<= 15 ~a8~0)) (.cse0 (= ~a21~0 1)) (.cse4 (<= ~a17~0 0)) (.cse8 (not .cse6)) (.cse2 (= ~a17~0 1)) (.cse9 (<= ~a16~0 5)) (.cse7 (<= ~a21~0 0))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse4 .cse5) (and .cse4 .cse6 .cse7) (and .cse0 .cse5 .cse6 .cse2) (and .cse3 .cse6 .cse2) (and .cse4 .cse8 .cse1) (and (<= 14 ~a8~0) .cse0 .cse4 .cse6) (and .cse9 .cse4 .cse8) (and .cse7 .cse6 .cse2) (and .cse9 .cse7)))) [2020-12-09 19:17:12,819 INFO L262 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-12-09 19:17:12,819 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 468) no Hoare annotation was computed. [2020-12-09 19:17:12,819 INFO L262 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-12-09 19:17:12,819 INFO L262 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-12-09 19:17:12,819 INFO L262 CegarLoopResult]: For program point L464-1(lines 40 585) no Hoare annotation was computed. [2020-12-09 19:17:12,819 INFO L262 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-12-09 19:17:12,819 INFO L262 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-12-09 19:17:12,820 INFO L262 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-12-09 19:17:12,820 INFO L262 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-12-09 19:17:12,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:17:12 BoogieIcfgContainer [2020-12-09 19:17:12,837 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 19:17:12,837 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 19:17:12,838 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 19:17:12,838 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 19:17:12,838 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:17:05" (3/4) ... [2020-12-09 19:17:12,841 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 19:17:12,860 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 102 nodes and edges [2020-12-09 19:17:12,862 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-12-09 19:17:12,863 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-12-09 19:17:12,865 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-09 19:17:12,970 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_61696005-86d4-4040-8018-fb1fddea9327/bin/utaipan/witness.graphml [2020-12-09 19:17:12,971 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 19:17:12,971 INFO L168 Benchmark]: Toolchain (without parser) took 9671.75 ms. Allocated memory was 92.3 MB in the beginning and 289.4 MB in the end (delta: 197.1 MB). Free memory was 56.3 MB in the beginning and 185.0 MB in the end (delta: -128.7 MB). Peak memory consumption was 68.9 MB. Max. memory is 16.1 GB. [2020-12-09 19:17:12,972 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 92.3 MB. Free memory is still 74.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:17:12,972 INFO L168 Benchmark]: CACSL2BoogieTranslator took 451.81 ms. Allocated memory is still 92.3 MB. Free memory was 56.2 MB in the beginning and 52.8 MB in the end (delta: 3.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 19:17:12,972 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.41 ms. Allocated memory is still 92.3 MB. Free memory was 52.8 MB in the beginning and 47.2 MB in the end (delta: 5.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 19:17:12,973 INFO L168 Benchmark]: Boogie Preprocessor took 57.78 ms. Allocated memory is still 92.3 MB. Free memory was 46.9 MB in the beginning and 42.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 19:17:12,973 INFO L168 Benchmark]: RCFGBuilder took 1277.48 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 42.7 MB in the beginning and 80.9 MB in the end (delta: -38.2 MB). Peak memory consumption was 30.4 MB. Max. memory is 16.1 GB. [2020-12-09 19:17:12,973 INFO L168 Benchmark]: TraceAbstraction took 7677.95 ms. Allocated memory was 134.2 MB in the beginning and 289.4 MB in the end (delta: 155.2 MB). Free memory was 80.9 MB in the beginning and 199.7 MB in the end (delta: -118.8 MB). Peak memory consumption was 148.6 MB. Max. memory is 16.1 GB. [2020-12-09 19:17:12,974 INFO L168 Benchmark]: Witness Printer took 133.17 ms. Allocated memory is still 289.4 MB. Free memory was 199.7 MB in the beginning and 185.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 19:17:12,975 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 92.3 MB. Free memory is still 74.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 451.81 ms. Allocated memory is still 92.3 MB. Free memory was 56.2 MB in the beginning and 52.8 MB in the end (delta: 3.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 66.41 ms. Allocated memory is still 92.3 MB. Free memory was 52.8 MB in the beginning and 47.2 MB in the end (delta: 5.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.78 ms. Allocated memory is still 92.3 MB. Free memory was 46.9 MB in the beginning and 42.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1277.48 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 42.7 MB in the beginning and 80.9 MB in the end (delta: -38.2 MB). Peak memory consumption was 30.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7677.95 ms. Allocated memory was 134.2 MB in the beginning and 289.4 MB in the end (delta: 155.2 MB). Free memory was 80.9 MB in the beginning and 199.7 MB in the end (delta: -118.8 MB). Peak memory consumption was 148.6 MB. Max. memory is 16.1 GB. * Witness Printer took 133.17 ms. Allocated memory is still 289.4 MB. Free memory was 199.7 MB in the beginning and 185.0 MB in the end (delta: 14.7 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: 468]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((a21 == 1 && 15 <= a8) && a17 == 1) || (((a21 == 1 && a16 <= 4) && a17 <= 0) && a7 <= 0)) || ((a17 <= 0 && a20 == 1) && a21 <= 0)) || (((a21 == 1 && a7 <= 0) && a20 == 1) && a17 == 1)) || ((a16 <= 4 && a20 == 1) && a17 == 1)) || ((a17 <= 0 && !(a20 == 1)) && 15 <= a8)) || (((14 <= a8 && a21 == 1) && a17 <= 0) && a20 == 1)) || ((a16 <= 5 && a17 <= 0) && !(a20 == 1))) || ((a21 <= 0 && a20 == 1) && a17 == 1)) || (a16 <= 5 && a21 <= 0) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((((a21 == 1 && 15 <= a8) && a17 == 1) || (((a21 == 1 && a16 <= 4) && a17 <= 0) && a7 <= 0)) || ((a17 <= 0 && a20 == 1) && a21 <= 0)) || (((a21 == 1 && a7 <= 0) && a20 == 1) && a17 == 1)) || ((a16 <= 4 && a20 == 1) && a17 == 1)) || ((a17 <= 0 && !(a20 == 1)) && 15 <= a8)) || (((14 <= a8 && a21 == 1) && a17 <= 0) && a20 == 1)) || ((a16 <= 5 && a17 <= 0) && !(a20 == 1))) || ((a21 <= 0 && a20 == 1) && a17 == 1)) || (a16 <= 5 && a21 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.3s, OverallIterations: 12, TraceHistogramMax: 7, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 516 SDtfs, 736 SDslu, 53 SDs, 0 SdLazy, 2683 SolverSat, 609 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1835 GetRequests, 1807 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1494occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 923 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 41 NumberOfFragments, 219 HoareAnnotationTreeSize, 3 FomulaSimplifications, 1070 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 218 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 2549 NumberOfCodeBlocks, 2549 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 3434 ConstructedInterpolants, 0 QuantifiedInterpolants, 1126502 SizeOfPredicates, 1 NumberOfNonLiveVariables, 2131 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 22 InterpolantComputations, 17 PerfectInterpolantSequences, 3566/3581 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...