./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/psyco/psyco_abp_1-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/psyco/psyco_abp_1-3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0db572bf30caf92f48b0dba5a9cc25cec23b8ac8 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:00:22,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:00:22,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:00:22,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:00:22,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:00:22,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:00:22,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:00:22,270 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:00:22,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:00:22,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:00:22,279 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:00:22,280 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:00:22,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:00:22,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:00:22,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:00:22,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:00:22,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:00:22,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:00:22,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:00:22,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:00:22,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:00:22,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:00:22,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:00:22,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:00:22,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:00:22,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:00:22,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:00:22,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:00:22,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:00:22,304 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:00:22,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:00:22,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:00:22,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:00:22,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:00:22,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:00:22,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:00:22,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:00:22,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:00:22,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:00:22,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:00:22,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:00:22,312 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:00:22,333 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:00:22,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:00:22,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:00:22,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:00:22,338 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:00:22,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:00:22,338 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:00:22,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:00:22,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:00:22,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:00:22,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:00:22,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:00:22,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:00:22,341 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:00:22,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:00:22,342 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:00:22,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:00:22,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:00:22,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:00:22,343 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:00:22,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:00:22,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:00:22,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:00:22,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:00:22,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:00:22,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:00:22,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:00:22,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:00:22,346 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:00:22,346 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> Automizer 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 -> 0db572bf30caf92f48b0dba5a9cc25cec23b8ac8 [2020-10-20 00:00:22,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:00:22,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:00:22,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:00:22,561 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:00:22,561 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:00:22,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/psyco/psyco_abp_1-3.c [2020-10-20 00:00:22,621 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26070127c/caa30a7fbceb44718f2cdf7484ee8c2c/FLAG9f822f3c1 [2020-10-20 00:00:23,130 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:00:23,131 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/psyco/psyco_abp_1-3.c [2020-10-20 00:00:23,161 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26070127c/caa30a7fbceb44718f2cdf7484ee8c2c/FLAG9f822f3c1 [2020-10-20 00:00:23,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26070127c/caa30a7fbceb44718f2cdf7484ee8c2c [2020-10-20 00:00:23,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:00:23,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:00:23,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:00:23,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:00:23,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:00:23,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:00:23" (1/1) ... [2020-10-20 00:00:23,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5382ae96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:00:23, skipping insertion in model container [2020-10-20 00:00:23,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:00:23" (1/1) ... [2020-10-20 00:00:23,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:00:23,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:00:23,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:00:23,864 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:00:23,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:00:23,987 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:00:23,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:00:23 WrapperNode [2020-10-20 00:00:23,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:00:23,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:00:23,989 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:00:23,989 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:00:23,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:00:23" (1/1) ... [2020-10-20 00:00:24,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:00:23" (1/1) ... [2020-10-20 00:00:24,074 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:00:24,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:00:24,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:00:24,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:00:24,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:00:23" (1/1) ... [2020-10-20 00:00:24,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:00:23" (1/1) ... [2020-10-20 00:00:24,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:00:23" (1/1) ... [2020-10-20 00:00:24,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:00:23" (1/1) ... [2020-10-20 00:00:24,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:00:23" (1/1) ... [2020-10-20 00:00:24,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:00:23" (1/1) ... [2020-10-20 00:00:24,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:00:23" (1/1) ... [2020-10-20 00:00:24,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:00:24,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:00:24,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:00:24,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:00:24,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:00:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 00:00:24,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:00:24,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:00:24,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:00:24,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:00:25,225 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:00:25,226 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-20 00:00:25,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:00:25 BoogieIcfgContainer [2020-10-20 00:00:25,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:00:25,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:00:25,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:00:25,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:00:25,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:00:23" (1/3) ... [2020-10-20 00:00:25,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba43194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:00:25, skipping insertion in model container [2020-10-20 00:00:25,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:00:23" (2/3) ... [2020-10-20 00:00:25,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba43194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:00:25, skipping insertion in model container [2020-10-20 00:00:25,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:00:25" (3/3) ... [2020-10-20 00:00:25,243 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-3.c [2020-10-20 00:00:25,255 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:00:25,261 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:00:25,273 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:00:25,297 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:00:25,298 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:00:25,298 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:00:25,298 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:00:25,298 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:00:25,299 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:00:25,299 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:00:25,299 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:00:25,318 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states. [2020-10-20 00:00:25,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 00:00:25,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:00:25,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:00:25,327 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:00:25,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:00:25,334 INFO L82 PathProgramCache]: Analyzing trace with hash 352571511, now seen corresponding path program 1 times [2020-10-20 00:00:25,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:00:25,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308924554] [2020-10-20 00:00:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:00:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:00:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:00:25,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308924554] [2020-10-20 00:00:25,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:00:25,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:00:25,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871788916] [2020-10-20 00:00:25,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:00:25,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:00:25,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:00:25,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:00:25,546 INFO L87 Difference]: Start difference. First operand 110 states. Second operand 2 states. [2020-10-20 00:00:25,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:00:25,581 INFO L93 Difference]: Finished difference Result 217 states and 417 transitions. [2020-10-20 00:00:25,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:00:25,582 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-10-20 00:00:25,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:00:25,595 INFO L225 Difference]: With dead ends: 217 [2020-10-20 00:00:25,596 INFO L226 Difference]: Without dead ends: 100 [2020-10-20 00:00:25,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:00:25,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-20 00:00:25,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-20 00:00:25,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-20 00:00:25,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 165 transitions. [2020-10-20 00:00:25,648 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 165 transitions. Word has length 9 [2020-10-20 00:00:25,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:00:25,649 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 165 transitions. [2020-10-20 00:00:25,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:00:25,649 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 165 transitions. [2020-10-20 00:00:25,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 00:00:25,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:00:25,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:00:25,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:00:25,651 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:00:25,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:00:25,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1422697561, now seen corresponding path program 1 times [2020-10-20 00:00:25,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:00:25,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277711756] [2020-10-20 00:00:25,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:00:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:00:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:00:25,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277711756] [2020-10-20 00:00:25,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:00:25,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:00:25,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441893897] [2020-10-20 00:00:25,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:00:25,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:00:25,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:00:25,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:00:25,711 INFO L87 Difference]: Start difference. First operand 100 states and 165 transitions. Second operand 3 states. [2020-10-20 00:00:25,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:00:25,768 INFO L93 Difference]: Finished difference Result 201 states and 332 transitions. [2020-10-20 00:00:25,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:00:25,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-20 00:00:25,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:00:25,771 INFO L225 Difference]: With dead ends: 201 [2020-10-20 00:00:25,771 INFO L226 Difference]: Without dead ends: 103 [2020-10-20 00:00:25,773 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 [2020-10-20 00:00:25,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-20 00:00:25,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-20 00:00:25,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-20 00:00:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 168 transitions. [2020-10-20 00:00:25,785 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 168 transitions. Word has length 10 [2020-10-20 00:00:25,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:00:25,786 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 168 transitions. [2020-10-20 00:00:25,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:00:25,786 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 168 transitions. [2020-10-20 00:00:25,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 00:00:25,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:00:25,787 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:00:25,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:00:25,788 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:00:25,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:00:25,788 INFO L82 PathProgramCache]: Analyzing trace with hash 658032730, now seen corresponding path program 1 times [2020-10-20 00:00:25,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:00:25,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035330702] [2020-10-20 00:00:25,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:00:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:00:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:00:26,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035330702] [2020-10-20 00:00:26,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:00:26,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:00:26,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164894972] [2020-10-20 00:00:26,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:00:26,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:00:26,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:00:26,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:00:26,007 INFO L87 Difference]: Start difference. First operand 103 states and 168 transitions. Second operand 3 states. [2020-10-20 00:00:26,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:00:26,190 INFO L93 Difference]: Finished difference Result 205 states and 334 transitions. [2020-10-20 00:00:26,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:00:26,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-20 00:00:26,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:00:26,193 INFO L225 Difference]: With dead ends: 205 [2020-10-20 00:00:26,193 INFO L226 Difference]: Without dead ends: 186 [2020-10-20 00:00:26,194 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 [2020-10-20 00:00:26,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-20 00:00:26,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 172. [2020-10-20 00:00:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-20 00:00:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 281 transitions. [2020-10-20 00:00:26,216 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 281 transitions. Word has length 15 [2020-10-20 00:00:26,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:00:26,217 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 281 transitions. [2020-10-20 00:00:26,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:00:26,217 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 281 transitions. [2020-10-20 00:00:26,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 00:00:26,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:00:26,218 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:00:26,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 00:00:26,219 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:00:26,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:00:26,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1675425412, now seen corresponding path program 1 times [2020-10-20 00:00:26,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:00:26,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574403027] [2020-10-20 00:00:26,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:00:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:00:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:00:26,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574403027] [2020-10-20 00:00:26,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:00:26,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:00:26,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538693535] [2020-10-20 00:00:26,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:00:26,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:00:26,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:00:26,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:00:26,278 INFO L87 Difference]: Start difference. First operand 172 states and 281 transitions. Second operand 3 states. [2020-10-20 00:00:26,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:00:26,326 INFO L93 Difference]: Finished difference Result 293 states and 477 transitions. [2020-10-20 00:00:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:00:26,327 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-20 00:00:26,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:00:26,328 INFO L225 Difference]: With dead ends: 293 [2020-10-20 00:00:26,328 INFO L226 Difference]: Without dead ends: 124 [2020-10-20 00:00:26,332 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 [2020-10-20 00:00:26,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-20 00:00:26,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-20 00:00:26,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-20 00:00:26,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 194 transitions. [2020-10-20 00:00:26,341 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 194 transitions. Word has length 16 [2020-10-20 00:00:26,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:00:26,342 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 194 transitions. [2020-10-20 00:00:26,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:00:26,342 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 194 transitions. [2020-10-20 00:00:26,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 00:00:26,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:00:26,344 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:00:26,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 00:00:26,345 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:00:26,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:00:26,345 INFO L82 PathProgramCache]: Analyzing trace with hash -843118083, now seen corresponding path program 1 times [2020-10-20 00:00:26,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:00:26,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656514521] [2020-10-20 00:00:26,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:00:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:00:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 00:00:26,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656514521] [2020-10-20 00:00:26,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:00:26,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:00:26,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389472624] [2020-10-20 00:00:26,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:00:26,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:00:26,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:00:26,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:00:26,412 INFO L87 Difference]: Start difference. First operand 122 states and 194 transitions. Second operand 3 states. [2020-10-20 00:00:26,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:00:26,471 INFO L93 Difference]: Finished difference Result 226 states and 358 transitions. [2020-10-20 00:00:26,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:00:26,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-20 00:00:26,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:00:26,473 INFO L225 Difference]: With dead ends: 226 [2020-10-20 00:00:26,473 INFO L226 Difference]: Without dead ends: 107 [2020-10-20 00:00:26,474 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 [2020-10-20 00:00:26,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-20 00:00:26,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-10-20 00:00:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-20 00:00:26,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 163 transitions. [2020-10-20 00:00:26,481 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 163 transitions. Word has length 21 [2020-10-20 00:00:26,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:00:26,482 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 163 transitions. [2020-10-20 00:00:26,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:00:26,482 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 163 transitions. [2020-10-20 00:00:26,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 00:00:26,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:00:26,484 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:00:26,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 00:00:26,485 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:00:26,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:00:26,485 INFO L82 PathProgramCache]: Analyzing trace with hash -671640130, now seen corresponding path program 1 times [2020-10-20 00:00:26,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:00:26,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112899714] [2020-10-20 00:00:26,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:00:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:00:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:00:26,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112899714] [2020-10-20 00:00:26,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401561113] [2020-10-20 00:00:26,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 00:00:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:00:26,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 00:00:26,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:00:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:00:26,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:00:26,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-10-20 00:00:26,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805928471] [2020-10-20 00:00:26,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 00:00:26,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:00:26,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 00:00:26,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:00:26,866 INFO L87 Difference]: Start difference. First operand 105 states and 163 transitions. Second operand 7 states. [2020-10-20 00:00:27,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:00:27,652 INFO L93 Difference]: Finished difference Result 435 states and 691 transitions. [2020-10-20 00:00:27,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 00:00:27,653 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-20 00:00:27,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:00:27,655 INFO L225 Difference]: With dead ends: 435 [2020-10-20 00:00:27,656 INFO L226 Difference]: Without dead ends: 316 [2020-10-20 00:00:27,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-20 00:00:27,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-20 00:00:27,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 292. [2020-10-20 00:00:27,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-10-20 00:00:27,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 460 transitions. [2020-10-20 00:00:27,688 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 460 transitions. Word has length 23 [2020-10-20 00:00:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:00:27,689 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 460 transitions. [2020-10-20 00:00:27,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 00:00:27,690 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 460 transitions. [2020-10-20 00:00:27,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 00:00:27,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:00:27,694 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:00:27,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-20 00:00:27,909 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:00:27,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:00:27,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1800121285, now seen corresponding path program 1 times [2020-10-20 00:00:27,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:00:27,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284999597] [2020-10-20 00:00:27,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:00:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:00:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 00:00:27,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284999597] [2020-10-20 00:00:27,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:00:27,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:00:27,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940838672] [2020-10-20 00:00:27,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:00:27,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:00:27,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:00:27,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:00:27,993 INFO L87 Difference]: Start difference. First operand 292 states and 460 transitions. Second operand 3 states. [2020-10-20 00:00:28,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:00:28,039 INFO L93 Difference]: Finished difference Result 582 states and 913 transitions. [2020-10-20 00:00:28,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:00:28,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-20 00:00:28,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:00:28,043 INFO L225 Difference]: With dead ends: 582 [2020-10-20 00:00:28,044 INFO L226 Difference]: Without dead ends: 314 [2020-10-20 00:00:28,045 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 [2020-10-20 00:00:28,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-20 00:00:28,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2020-10-20 00:00:28,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-20 00:00:28,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 480 transitions. [2020-10-20 00:00:28,060 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 480 transitions. Word has length 25 [2020-10-20 00:00:28,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:00:28,061 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 480 transitions. [2020-10-20 00:00:28,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:00:28,061 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 480 transitions. [2020-10-20 00:00:28,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 00:00:28,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:00:28,066 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:00:28,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-20 00:00:28,067 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:00:28,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:00:28,068 INFO L82 PathProgramCache]: Analyzing trace with hash 2124865792, now seen corresponding path program 1 times [2020-10-20 00:00:28,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:00:28,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29800896] [2020-10-20 00:00:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:00:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:00:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 00:00:28,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29800896] [2020-10-20 00:00:28,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:00:28,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:00:28,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654352014] [2020-10-20 00:00:28,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:00:28,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:00:28,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:00:28,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:00:28,201 INFO L87 Difference]: Start difference. First operand 312 states and 480 transitions. Second operand 3 states. [2020-10-20 00:00:28,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:00:28,233 INFO L93 Difference]: Finished difference Result 315 states and 482 transitions. [2020-10-20 00:00:28,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:00:28,234 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-20 00:00:28,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:00:28,236 INFO L225 Difference]: With dead ends: 315 [2020-10-20 00:00:28,236 INFO L226 Difference]: Without dead ends: 309 [2020-10-20 00:00:28,237 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 [2020-10-20 00:00:28,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-20 00:00:28,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 308. [2020-10-20 00:00:28,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-20 00:00:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 468 transitions. [2020-10-20 00:00:28,249 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 468 transitions. Word has length 27 [2020-10-20 00:00:28,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:00:28,250 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 468 transitions. [2020-10-20 00:00:28,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:00:28,250 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 468 transitions. [2020-10-20 00:00:28,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-20 00:00:28,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:00:28,252 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:00:28,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-20 00:00:28,252 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:00:28,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:00:28,253 INFO L82 PathProgramCache]: Analyzing trace with hash -917092134, now seen corresponding path program 1 times [2020-10-20 00:00:28,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:00:28,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241954230] [2020-10-20 00:00:28,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:00:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:00:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 00:00:28,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241954230] [2020-10-20 00:00:28,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:00:28,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:00:28,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839728973] [2020-10-20 00:00:28,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:00:28,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:00:28,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:00:28,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:00:28,296 INFO L87 Difference]: Start difference. First operand 308 states and 468 transitions. Second operand 3 states. [2020-10-20 00:00:28,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:00:28,333 INFO L93 Difference]: Finished difference Result 528 states and 802 transitions. [2020-10-20 00:00:28,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:00:28,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-10-20 00:00:28,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:00:28,336 INFO L225 Difference]: With dead ends: 528 [2020-10-20 00:00:28,337 INFO L226 Difference]: Without dead ends: 244 [2020-10-20 00:00:28,338 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 [2020-10-20 00:00:28,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-20 00:00:28,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2020-10-20 00:00:28,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-20 00:00:28,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 362 transitions. [2020-10-20 00:00:28,348 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 362 transitions. Word has length 33 [2020-10-20 00:00:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:00:28,349 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 362 transitions. [2020-10-20 00:00:28,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:00:28,349 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 362 transitions. [2020-10-20 00:00:28,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-20 00:00:28,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:00:28,350 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-20 00:00:28,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-20 00:00:28,351 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:00:28,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:00:28,351 INFO L82 PathProgramCache]: Analyzing trace with hash 272165387, now seen corresponding path program 1 times [2020-10-20 00:00:28,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:00:28,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445424190] [2020-10-20 00:00:28,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:00:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:00:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 00:00:28,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445424190] [2020-10-20 00:00:28,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:00:28,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:00:28,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856021374] [2020-10-20 00:00:28,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:00:28,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:00:28,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:00:28,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:00:28,395 INFO L87 Difference]: Start difference. First operand 242 states and 362 transitions. Second operand 3 states. [2020-10-20 00:00:28,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:00:28,452 INFO L93 Difference]: Finished difference Result 425 states and 633 transitions. [2020-10-20 00:00:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:00:28,452 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-10-20 00:00:28,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:00:28,454 INFO L225 Difference]: With dead ends: 425 [2020-10-20 00:00:28,454 INFO L226 Difference]: Without dead ends: 225 [2020-10-20 00:00:28,455 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 [2020-10-20 00:00:28,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-20 00:00:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2020-10-20 00:00:28,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-20 00:00:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 324 transitions. [2020-10-20 00:00:28,465 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 324 transitions. Word has length 37 [2020-10-20 00:00:28,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:00:28,466 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 324 transitions. [2020-10-20 00:00:28,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:00:28,467 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 324 transitions. [2020-10-20 00:00:28,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-20 00:00:28,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:00:28,468 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 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] [2020-10-20 00:00:28,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-20 00:00:28,469 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:00:28,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:00:28,469 INFO L82 PathProgramCache]: Analyzing trace with hash -140510671, now seen corresponding path program 1 times [2020-10-20 00:00:28,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:00:28,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912506396] [2020-10-20 00:00:28,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:00:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:00:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-20 00:00:28,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912506396] [2020-10-20 00:00:28,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:00:28,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:00:28,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991892563] [2020-10-20 00:00:28,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:00:28,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:00:28,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:00:28,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:00:28,532 INFO L87 Difference]: Start difference. First operand 223 states and 324 transitions. Second operand 3 states. [2020-10-20 00:00:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:00:28,566 INFO L93 Difference]: Finished difference Result 305 states and 442 transitions. [2020-10-20 00:00:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:00:28,567 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-10-20 00:00:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:00:28,568 INFO L225 Difference]: With dead ends: 305 [2020-10-20 00:00:28,569 INFO L226 Difference]: Without dead ends: 143 [2020-10-20 00:00:28,570 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 [2020-10-20 00:00:28,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-20 00:00:28,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2020-10-20 00:00:28,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-20 00:00:28,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 199 transitions. [2020-10-20 00:00:28,577 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 199 transitions. Word has length 46 [2020-10-20 00:00:28,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:00:28,577 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 199 transitions. [2020-10-20 00:00:28,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:00:28,578 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 199 transitions. [2020-10-20 00:00:28,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-20 00:00:28,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:00:28,579 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:00:28,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-20 00:00:28,579 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:00:28,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:00:28,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1014660280, now seen corresponding path program 1 times [2020-10-20 00:00:28,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:00:28,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731006185] [2020-10-20 00:00:28,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:00:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:00:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 00:00:28,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731006185] [2020-10-20 00:00:28,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197007619] [2020-10-20 00:00:28,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 00:00:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:00:28,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 00:00:28,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:00:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 00:00:28,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:00:28,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-10-20 00:00:28,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907701590] [2020-10-20 00:00:28,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 00:00:28,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:00:28,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 00:00:28,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:00:28,834 INFO L87 Difference]: Start difference. First operand 141 states and 199 transitions. Second operand 7 states. [2020-10-20 00:00:28,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:00:28,944 INFO L93 Difference]: Finished difference Result 186 states and 260 transitions. [2020-10-20 00:00:28,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 00:00:28,945 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-10-20 00:00:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:00:28,946 INFO L225 Difference]: With dead ends: 186 [2020-10-20 00:00:28,946 INFO L226 Difference]: Without dead ends: 178 [2020-10-20 00:00:28,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:00:28,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-20 00:00:28,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 137. [2020-10-20 00:00:28,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-20 00:00:28,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 191 transitions. [2020-10-20 00:00:28,955 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 191 transitions. Word has length 47 [2020-10-20 00:00:28,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:00:28,956 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 191 transitions. [2020-10-20 00:00:28,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 00:00:28,956 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 191 transitions. [2020-10-20 00:00:28,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-20 00:00:28,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:00:28,957 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:00:29,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-20 00:00:29,173 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:00:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:00:29,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1003777494, now seen corresponding path program 1 times [2020-10-20 00:00:29,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:00:29,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37819135] [2020-10-20 00:00:29,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:00:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:00:29,488 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 17 [2020-10-20 00:00:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:00:29,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37819135] [2020-10-20 00:00:29,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413055800] [2020-10-20 00:00:29,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 00:00:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:00:29,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-20 00:00:29,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:00:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:00:29,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:00:29,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2020-10-20 00:00:29,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256068377] [2020-10-20 00:00:29,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 00:00:29,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:00:29,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 00:00:29,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:00:29,747 INFO L87 Difference]: Start difference. First operand 137 states and 191 transitions. Second operand 10 states. [2020-10-20 00:00:29,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:00:29,848 INFO L93 Difference]: Finished difference Result 160 states and 222 transitions. [2020-10-20 00:00:29,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 00:00:29,849 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-10-20 00:00:29,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:00:29,851 INFO L225 Difference]: With dead ends: 160 [2020-10-20 00:00:29,851 INFO L226 Difference]: Without dead ends: 158 [2020-10-20 00:00:29,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:00:29,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-20 00:00:29,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2020-10-20 00:00:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-20 00:00:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 220 transitions. [2020-10-20 00:00:29,859 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 220 transitions. Word has length 51 [2020-10-20 00:00:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:00:29,860 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 220 transitions. [2020-10-20 00:00:29,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 00:00:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 220 transitions. [2020-10-20 00:00:29,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-20 00:00:29,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:00:29,861 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:00:30,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-20 00:00:30,062 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:00:30,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:00:30,062 INFO L82 PathProgramCache]: Analyzing trace with hash 751253453, now seen corresponding path program 1 times [2020-10-20 00:00:30,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:00:30,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285440523] [2020-10-20 00:00:30,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:00:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:00:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:00:30,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285440523] [2020-10-20 00:00:30,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220361335] [2020-10-20 00:00:30,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 00:00:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:00:30,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-20 00:00:30,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:00:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:00:30,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:00:30,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-10-20 00:00:30,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058269794] [2020-10-20 00:00:30,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 00:00:30,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:00:30,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 00:00:30,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-20 00:00:30,509 INFO L87 Difference]: Start difference. First operand 158 states and 220 transitions. Second operand 11 states. [2020-10-20 00:00:30,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:00:30,641 INFO L93 Difference]: Finished difference Result 250 states and 352 transitions. [2020-10-20 00:00:30,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 00:00:30,643 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-20 00:00:30,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:00:30,644 INFO L225 Difference]: With dead ends: 250 [2020-10-20 00:00:30,645 INFO L226 Difference]: Without dead ends: 248 [2020-10-20 00:00:30,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-20 00:00:30,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-20 00:00:30,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2020-10-20 00:00:30,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-20 00:00:30,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 346 transitions. [2020-10-20 00:00:30,656 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 346 transitions. Word has length 57 [2020-10-20 00:00:30,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:00:30,656 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 346 transitions. [2020-10-20 00:00:30,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 00:00:30,657 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 346 transitions. [2020-10-20 00:00:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-20 00:00:30,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:00:30,658 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 7, 7, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:00:30,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:00:30,871 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:00:30,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:00:30,872 INFO L82 PathProgramCache]: Analyzing trace with hash 366250712, now seen corresponding path program 1 times [2020-10-20 00:00:30,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:00:30,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134176147] [2020-10-20 00:00:30,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:00:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:00:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 20 proven. 159 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-20 00:00:31,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134176147] [2020-10-20 00:00:31,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169279686] [2020-10-20 00:00:31,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 00:00:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:00:31,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-20 00:00:31,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:00:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 20 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:00:31,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:00:31,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12] total 16 [2020-10-20 00:00:31,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560627253] [2020-10-20 00:00:31,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 00:00:31,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:00:31,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 00:00:31,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-20 00:00:31,866 INFO L87 Difference]: Start difference. First operand 248 states and 346 transitions. Second operand 16 states. [2020-10-20 00:00:32,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:00:32,095 INFO L93 Difference]: Finished difference Result 266 states and 372 transitions. [2020-10-20 00:00:32,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 00:00:32,097 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-10-20 00:00:32,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:00:32,097 INFO L225 Difference]: With dead ends: 266 [2020-10-20 00:00:32,097 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 00:00:32,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-20 00:00:32,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 00:00:32,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 00:00:32,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 00:00:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 00:00:32,099 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2020-10-20 00:00:32,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:00:32,100 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 00:00:32,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 00:00:32,100 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 00:00:32,101 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 00:00:32,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-20 00:00:32,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 00:00:32,757 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 46 [2020-10-20 00:00:32,762 INFO L274 CegarLoopResult]: For program point L432(lines 432 434) no Hoare annotation was computed. [2020-10-20 00:00:32,762 INFO L274 CegarLoopResult]: For program point L300(lines 300 302) no Hoare annotation was computed. [2020-10-20 00:00:32,762 INFO L274 CegarLoopResult]: For program point L168(lines 168 170) no Hoare annotation was computed. [2020-10-20 00:00:32,763 INFO L274 CegarLoopResult]: For program point L532(lines 532 534) no Hoare annotation was computed. [2020-10-20 00:00:32,763 INFO L274 CegarLoopResult]: For program point L400(lines 400 402) no Hoare annotation was computed. [2020-10-20 00:00:32,763 INFO L274 CegarLoopResult]: For program point L268(lines 268 270) no Hoare annotation was computed. [2020-10-20 00:00:32,763 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-10-20 00:00:32,764 INFO L274 CegarLoopResult]: For program point L500(lines 500 502) no Hoare annotation was computed. [2020-10-20 00:00:32,764 INFO L274 CegarLoopResult]: For program point L368(lines 368 370) no Hoare annotation was computed. [2020-10-20 00:00:32,764 INFO L274 CegarLoopResult]: For program point L468(lines 468 470) no Hoare annotation was computed. [2020-10-20 00:00:32,764 INFO L274 CegarLoopResult]: For program point L41(lines 41 60) no Hoare annotation was computed. [2020-10-20 00:00:32,764 INFO L274 CegarLoopResult]: For program point L42(lines 42 57) no Hoare annotation was computed. [2020-10-20 00:00:32,765 INFO L274 CegarLoopResult]: For program point L142(lines 142 157) no Hoare annotation was computed. [2020-10-20 00:00:32,765 INFO L274 CegarLoopResult]: For program point L242(lines 242 257) no Hoare annotation was computed. [2020-10-20 00:00:32,765 INFO L274 CegarLoopResult]: For program point L110(lines 110 125) no Hoare annotation was computed. [2020-10-20 00:00:32,765 INFO L274 CegarLoopResult]: For program point L44(lines 44 55) no Hoare annotation was computed. [2020-10-20 00:00:32,766 INFO L274 CegarLoopResult]: For program point L342(lines 342 357) no Hoare annotation was computed. [2020-10-20 00:00:32,766 INFO L274 CegarLoopResult]: For program point L210(lines 210 225) no Hoare annotation was computed. [2020-10-20 00:00:32,766 INFO L274 CegarLoopResult]: For program point L144(lines 144 155) no Hoare annotation was computed. [2020-10-20 00:00:32,766 INFO L274 CegarLoopResult]: For program point L78(lines 78 93) no Hoare annotation was computed. [2020-10-20 00:00:32,766 INFO L274 CegarLoopResult]: For program point L442(lines 442 457) no Hoare annotation was computed. [2020-10-20 00:00:32,767 INFO L274 CegarLoopResult]: For program point L310(lines 310 325) no Hoare annotation was computed. [2020-10-20 00:00:32,767 INFO L274 CegarLoopResult]: For program point L244(lines 244 255) no Hoare annotation was computed. [2020-10-20 00:00:32,767 INFO L274 CegarLoopResult]: For program point L178(lines 178 193) no Hoare annotation was computed. [2020-10-20 00:00:32,767 INFO L274 CegarLoopResult]: For program point L112(lines 112 123) no Hoare annotation was computed. [2020-10-20 00:00:32,767 INFO L274 CegarLoopResult]: For program point L542(lines 542 557) no Hoare annotation was computed. [2020-10-20 00:00:32,768 INFO L274 CegarLoopResult]: For program point L410(lines 410 425) no Hoare annotation was computed. [2020-10-20 00:00:32,768 INFO L274 CegarLoopResult]: For program point L344(lines 344 355) no Hoare annotation was computed. [2020-10-20 00:00:32,768 INFO L274 CegarLoopResult]: For program point L278(lines 278 293) no Hoare annotation was computed. [2020-10-20 00:00:32,768 INFO L274 CegarLoopResult]: For program point L212(lines 212 223) no Hoare annotation was computed. [2020-10-20 00:00:32,768 INFO L274 CegarLoopResult]: For program point L80(lines 80 91) no Hoare annotation was computed. [2020-10-20 00:00:32,769 INFO L274 CegarLoopResult]: For program point L510(lines 510 525) no Hoare annotation was computed. [2020-10-20 00:00:32,769 INFO L274 CegarLoopResult]: For program point L444(lines 444 455) no Hoare annotation was computed. [2020-10-20 00:00:32,769 INFO L274 CegarLoopResult]: For program point L378(lines 378 393) no Hoare annotation was computed. [2020-10-20 00:00:32,769 INFO L274 CegarLoopResult]: For program point L312(lines 312 323) no Hoare annotation was computed. [2020-10-20 00:00:32,769 INFO L274 CegarLoopResult]: For program point L180(lines 180 191) no Hoare annotation was computed. [2020-10-20 00:00:32,769 INFO L274 CegarLoopResult]: For program point L48(lines 48 50) no Hoare annotation was computed. [2020-10-20 00:00:32,770 INFO L274 CegarLoopResult]: For program point L544(lines 544 555) no Hoare annotation was computed. [2020-10-20 00:00:32,770 INFO L274 CegarLoopResult]: For program point L478(lines 478 493) no Hoare annotation was computed. [2020-10-20 00:00:32,770 INFO L274 CegarLoopResult]: For program point L412(lines 412 423) no Hoare annotation was computed. [2020-10-20 00:00:32,770 INFO L274 CegarLoopResult]: For program point L280(lines 280 291) no Hoare annotation was computed. [2020-10-20 00:00:32,770 INFO L274 CegarLoopResult]: For program point L148(lines 148 150) no Hoare annotation was computed. [2020-10-20 00:00:32,771 INFO L277 CegarLoopResult]: At program point L16(lines 16 568) the Hoare annotation is: true [2020-10-20 00:00:32,771 INFO L274 CegarLoopResult]: For program point L512(lines 512 523) no Hoare annotation was computed. [2020-10-20 00:00:32,771 INFO L274 CegarLoopResult]: For program point L380(lines 380 391) no Hoare annotation was computed. [2020-10-20 00:00:32,771 INFO L274 CegarLoopResult]: For program point L248(lines 248 250) no Hoare annotation was computed. [2020-10-20 00:00:32,772 INFO L274 CegarLoopResult]: For program point L116(lines 116 118) no Hoare annotation was computed. [2020-10-20 00:00:32,772 INFO L274 CegarLoopResult]: For program point L480(lines 480 491) no Hoare annotation was computed. [2020-10-20 00:00:32,772 INFO L274 CegarLoopResult]: For program point L348(lines 348 350) no Hoare annotation was computed. [2020-10-20 00:00:32,772 INFO L274 CegarLoopResult]: For program point L216(lines 216 218) no Hoare annotation was computed. [2020-10-20 00:00:32,772 INFO L274 CegarLoopResult]: For program point L84(lines 84 86) no Hoare annotation was computed. [2020-10-20 00:00:32,772 INFO L274 CegarLoopResult]: For program point L448(lines 448 450) no Hoare annotation was computed. [2020-10-20 00:00:32,773 INFO L274 CegarLoopResult]: For program point L316(lines 316 318) no Hoare annotation was computed. [2020-10-20 00:00:32,773 INFO L274 CegarLoopResult]: For program point L184(lines 184 186) no Hoare annotation was computed. [2020-10-20 00:00:32,773 INFO L274 CegarLoopResult]: For program point L548(lines 548 550) no Hoare annotation was computed. [2020-10-20 00:00:32,773 INFO L274 CegarLoopResult]: For program point L416(lines 416 418) no Hoare annotation was computed. [2020-10-20 00:00:32,773 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 00:00:32,773 INFO L274 CegarLoopResult]: For program point L284(lines 284 286) no Hoare annotation was computed. [2020-10-20 00:00:32,774 INFO L270 CegarLoopResult]: At program point L549(lines 16 568) the Hoare annotation is: false [2020-10-20 00:00:32,774 INFO L274 CegarLoopResult]: For program point L516(lines 516 518) no Hoare annotation was computed. [2020-10-20 00:00:32,774 INFO L274 CegarLoopResult]: For program point L384(lines 384 386) no Hoare annotation was computed. [2020-10-20 00:00:32,774 INFO L274 CegarLoopResult]: For program point L484(lines 484 486) no Hoare annotation was computed. [2020-10-20 00:00:32,774 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 00:00:32,775 INFO L270 CegarLoopResult]: At program point L26-2(lines 26 563) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~this_expect~0 (+ (* 2 (div (+ ULTIMATE.start_main_~this_expect~0 (- 2)) 2)) 2)) (<= 5 ULTIMATE.start_main_~q~0) (<= 0 (+ ULTIMATE.start_main_~P8~0 2147483648)) (= ULTIMATE.start_main_~this_buffer_empty~0 0) (<= (div ULTIMATE.start_main_~P8~0 4294967296) 0)) (and (= ULTIMATE.start_main_~q~0 0) (<= ULTIMATE.start_main_~this_buffer_empty~0 0) (< 0 (+ (div ULTIMATE.start_main_~this_buffer_empty~0 4294967296) 1)) (= ULTIMATE.start_main_~this_expect~0 0))) [2020-10-20 00:00:32,775 INFO L274 CegarLoopResult]: For program point L26-3(lines 26 563) no Hoare annotation was computed. [2020-10-20 00:00:32,775 INFO L274 CegarLoopResult]: For program point L126(lines 126 141) no Hoare annotation was computed. [2020-10-20 00:00:32,775 INFO L274 CegarLoopResult]: For program point L226(lines 226 241) no Hoare annotation was computed. [2020-10-20 00:00:32,775 INFO L274 CegarLoopResult]: For program point L94(lines 94 109) no Hoare annotation was computed. [2020-10-20 00:00:32,776 INFO L274 CegarLoopResult]: For program point L61(lines 61 160) no Hoare annotation was computed. [2020-10-20 00:00:32,776 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 00:00:32,776 INFO L274 CegarLoopResult]: For program point L326(lines 326 341) no Hoare annotation was computed. [2020-10-20 00:00:32,776 INFO L274 CegarLoopResult]: For program point L194(lines 194 209) no Hoare annotation was computed. [2020-10-20 00:00:32,776 INFO L274 CegarLoopResult]: For program point L161(lines 161 260) no Hoare annotation was computed. [2020-10-20 00:00:32,776 INFO L274 CegarLoopResult]: For program point L128(lines 128 139) no Hoare annotation was computed. [2020-10-20 00:00:32,777 INFO L274 CegarLoopResult]: For program point L62(lines 62 77) no Hoare annotation was computed. [2020-10-20 00:00:32,777 INFO L274 CegarLoopResult]: For program point L426(lines 426 441) no Hoare annotation was computed. [2020-10-20 00:00:32,777 INFO L274 CegarLoopResult]: For program point L294(lines 294 309) no Hoare annotation was computed. [2020-10-20 00:00:32,777 INFO L274 CegarLoopResult]: For program point L261(lines 261 360) no Hoare annotation was computed. [2020-10-20 00:00:32,777 INFO L274 CegarLoopResult]: For program point L228(lines 228 239) no Hoare annotation was computed. [2020-10-20 00:00:32,777 INFO L274 CegarLoopResult]: For program point L162(lines 162 177) no Hoare annotation was computed. [2020-10-20 00:00:32,778 INFO L274 CegarLoopResult]: For program point L96(lines 96 107) no Hoare annotation was computed. [2020-10-20 00:00:32,778 INFO L270 CegarLoopResult]: At program point L559(lines 26 563) the Hoare annotation is: (let ((.cse4 (<= ULTIMATE.start_main_~this_expect~0 (+ (* 2 (div (+ ULTIMATE.start_main_~this_expect~0 (- 2)) 2)) 2))) (.cse3 (= ULTIMATE.start_main_~this_buffer_empty~0 1)) (.cse0 (<= ULTIMATE.start_main_~this_expect~0 (+ (* 2 (div (+ ULTIMATE.start_main_~this_expect~0 (- 1)) 2)) 1))) (.cse1 (<= 0 (+ ULTIMATE.start_main_~P8~0 2147483648))) (.cse5 (= ULTIMATE.start_main_~this_buffer_empty~0 0)) (.cse2 (<= (div ULTIMATE.start_main_~P8~0 4294967296) 0))) (or (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~q~0 4) .cse3) (and .cse4 (<= 5 ULTIMATE.start_main_~q~0) .cse1 .cse5 .cse2) (and (= ULTIMATE.start_main_~q~0 0) (<= ULTIMATE.start_main_~this_buffer_empty~0 0) (< 0 (+ (div ULTIMATE.start_main_~this_buffer_empty~0 4294967296) 1)) (= ULTIMATE.start_main_~this_expect~0 0)) (and (= ULTIMATE.start_main_~q~0 1) .cse4 .cse1 .cse2 .cse3) (and .cse0 .cse1 (= ULTIMATE.start_main_~q~0 3) .cse5 .cse2))) [2020-10-20 00:00:32,778 INFO L274 CegarLoopResult]: For program point L526(lines 526 541) no Hoare annotation was computed. [2020-10-20 00:00:32,779 INFO L274 CegarLoopResult]: For program point L394(lines 394 409) no Hoare annotation was computed. [2020-10-20 00:00:32,779 INFO L274 CegarLoopResult]: For program point L361(lines 361 460) no Hoare annotation was computed. [2020-10-20 00:00:32,779 INFO L274 CegarLoopResult]: For program point L328(lines 328 339) no Hoare annotation was computed. [2020-10-20 00:00:32,779 INFO L274 CegarLoopResult]: For program point L262(lines 262 277) no Hoare annotation was computed. [2020-10-20 00:00:32,779 INFO L274 CegarLoopResult]: For program point L196(lines 196 207) no Hoare annotation was computed. [2020-10-20 00:00:32,779 INFO L274 CegarLoopResult]: For program point L64(lines 64 75) no Hoare annotation was computed. [2020-10-20 00:00:32,780 INFO L274 CegarLoopResult]: For program point L494(lines 494 509) no Hoare annotation was computed. [2020-10-20 00:00:32,780 INFO L274 CegarLoopResult]: For program point L461(lines 461 560) no Hoare annotation was computed. [2020-10-20 00:00:32,780 INFO L274 CegarLoopResult]: For program point L428(lines 428 439) no Hoare annotation was computed. [2020-10-20 00:00:32,780 INFO L274 CegarLoopResult]: For program point L362(lines 362 377) no Hoare annotation was computed. [2020-10-20 00:00:32,780 INFO L274 CegarLoopResult]: For program point L296(lines 296 307) no Hoare annotation was computed. [2020-10-20 00:00:32,780 INFO L274 CegarLoopResult]: For program point L164(lines 164 175) no Hoare annotation was computed. [2020-10-20 00:00:32,781 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 00:00:32,781 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-20 00:00:32,781 INFO L274 CegarLoopResult]: For program point L528(lines 528 539) no Hoare annotation was computed. [2020-10-20 00:00:32,781 INFO L274 CegarLoopResult]: For program point L462(lines 462 477) no Hoare annotation was computed. [2020-10-20 00:00:32,781 INFO L274 CegarLoopResult]: For program point L396(lines 396 407) no Hoare annotation was computed. [2020-10-20 00:00:32,782 INFO L274 CegarLoopResult]: For program point L264(lines 264 275) no Hoare annotation was computed. [2020-10-20 00:00:32,782 INFO L274 CegarLoopResult]: For program point L132(lines 132 134) no Hoare annotation was computed. [2020-10-20 00:00:32,782 INFO L274 CegarLoopResult]: For program point L496(lines 496 507) no Hoare annotation was computed. [2020-10-20 00:00:32,782 INFO L274 CegarLoopResult]: For program point L364(lines 364 375) no Hoare annotation was computed. [2020-10-20 00:00:32,782 INFO L274 CegarLoopResult]: For program point L232(lines 232 234) no Hoare annotation was computed. [2020-10-20 00:00:32,782 INFO L274 CegarLoopResult]: For program point L100(lines 100 102) no Hoare annotation was computed. [2020-10-20 00:00:32,783 INFO L274 CegarLoopResult]: For program point L464(lines 464 475) no Hoare annotation was computed. [2020-10-20 00:00:32,783 INFO L274 CegarLoopResult]: For program point L332(lines 332 334) no Hoare annotation was computed. [2020-10-20 00:00:32,783 INFO L274 CegarLoopResult]: For program point L200(lines 200 202) no Hoare annotation was computed. [2020-10-20 00:00:32,783 INFO L274 CegarLoopResult]: For program point L68(lines 68 70) no Hoare annotation was computed. [2020-10-20 00:00:32,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:00:32 BoogieIcfgContainer [2020-10-20 00:00:32,810 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:00:32,811 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:00:32,811 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:00:32,811 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:00:32,812 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:00:25" (3/4) ... [2020-10-20 00:00:32,817 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 00:00:32,837 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-20 00:00:32,838 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 00:00:32,838 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 00:00:32,838 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 00:00:32,890 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:00:32,890 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:00:32,892 INFO L168 Benchmark]: Toolchain (without parser) took 9445.19 ms. Allocated memory was 36.2 MB in the beginning and 104.9 MB in the end (delta: 68.7 MB). Free memory was 18.8 MB in the beginning and 50.9 MB in the end (delta: -32.1 MB). Peak memory consumption was 36.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:00:32,893 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 34.1 MB. Free memory was 12.4 MB in the beginning and 12.4 MB in the end (delta: 47.6 kB). Peak memory consumption was 47.6 kB. Max. memory is 14.3 GB. [2020-10-20 00:00:32,894 INFO L168 Benchmark]: CACSL2BoogieTranslator took 536.27 ms. Allocated memory was 36.2 MB in the beginning and 44.0 MB in the end (delta: 7.9 MB). Free memory was 17.9 MB in the beginning and 16.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:00:32,895 INFO L168 Benchmark]: Boogie Procedure Inliner took 85.52 ms. Allocated memory was 44.0 MB in the beginning and 46.1 MB in the end (delta: 2.1 MB). Free memory was 16.3 MB in the beginning and 24.9 MB in the end (delta: -8.6 MB). Peak memory consumption was 5.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:00:32,896 INFO L168 Benchmark]: Boogie Preprocessor took 70.38 ms. Allocated memory is still 46.1 MB. Free memory was 24.9 MB in the beginning and 21.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:00:32,897 INFO L168 Benchmark]: RCFGBuilder took 1084.26 ms. Allocated memory was 46.1 MB in the beginning and 49.8 MB in the end (delta: 3.7 MB). Free memory was 21.4 MB in the beginning and 22.5 MB in the end (delta: -1.1 MB). Peak memory consumption was 15.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:00:32,897 INFO L168 Benchmark]: TraceAbstraction took 7577.86 ms. Allocated memory was 49.8 MB in the beginning and 104.9 MB in the end (delta: 55.1 MB). Free memory was 22.2 MB in the beginning and 54.8 MB in the end (delta: -32.6 MB). Peak memory consumption was 56.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:00:32,898 INFO L168 Benchmark]: Witness Printer took 79.38 ms. Allocated memory is still 104.9 MB. Free memory was 54.8 MB in the beginning and 50.9 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:00:32,902 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 34.1 MB. Free memory was 12.4 MB in the beginning and 12.4 MB in the end (delta: 47.6 kB). Peak memory consumption was 47.6 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 536.27 ms. Allocated memory was 36.2 MB in the beginning and 44.0 MB in the end (delta: 7.9 MB). Free memory was 17.9 MB in the beginning and 16.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 85.52 ms. Allocated memory was 44.0 MB in the beginning and 46.1 MB in the end (delta: 2.1 MB). Free memory was 16.3 MB in the beginning and 24.9 MB in the end (delta: -8.6 MB). Peak memory consumption was 5.1 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 70.38 ms. Allocated memory is still 46.1 MB. Free memory was 24.9 MB in the beginning and 21.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.3 GB. * RCFGBuilder took 1084.26 ms. Allocated memory was 46.1 MB in the beginning and 49.8 MB in the end (delta: 3.7 MB). Free memory was 21.4 MB in the beginning and 22.5 MB in the end (delta: -1.1 MB). Peak memory consumption was 15.5 MB. Max. memory is 14.3 GB. * TraceAbstraction took 7577.86 ms. Allocated memory was 49.8 MB in the beginning and 104.9 MB in the end (delta: 55.1 MB). Free memory was 22.2 MB in the beginning and 54.8 MB in the end (delta: -32.6 MB). Peak memory consumption was 56.5 MB. Max. memory is 14.3 GB. * Witness Printer took 79.38 ms. Allocated memory is still 104.9 MB. Free memory was 54.8 MB in the beginning and 50.9 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: ((((this_expect <= 2 * ((this_expect + -2) / 2) + 2 && 5 <= q) && 0 <= P8 + 2147483648) && this_buffer_empty == 0) && P8 / 4294967296 <= 0) || (((q == 0 && this_buffer_empty <= 0) && 0 < this_buffer_empty / 4294967296 + 1) && this_expect == 0) - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (((((((this_expect <= 2 * ((this_expect + -1) / 2) + 1 && 0 <= P8 + 2147483648) && P8 / 4294967296 <= 0) && q == 4) && this_buffer_empty == 1) || ((((this_expect <= 2 * ((this_expect + -2) / 2) + 2 && 5 <= q) && 0 <= P8 + 2147483648) && this_buffer_empty == 0) && P8 / 4294967296 <= 0)) || (((q == 0 && this_buffer_empty <= 0) && 0 < this_buffer_empty / 4294967296 + 1) && this_expect == 0)) || ((((q == 1 && this_expect <= 2 * ((this_expect + -2) / 2) + 2) && 0 <= P8 + 2147483648) && P8 / 4294967296 <= 0) && this_buffer_empty == 1)) || ((((this_expect <= 2 * ((this_expect + -1) / 2) + 1 && 0 <= P8 + 2147483648) && q == 3) && this_buffer_empty == 0) && P8 / 4294967296 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 110 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.0s, OverallIterations: 15, TraceHistogramMax: 11, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2321 SDtfs, 1898 SDslu, 6439 SDs, 0 SdLazy, 731 SolverSat, 136 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 356 GetRequests, 295 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=312occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 92 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 24 NumberOfFragments, 178 HoareAnnotationTreeSize, 4 FomulaSimplifications, 154 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 857 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 811 NumberOfCodeBlocks, 811 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 791 ConstructedInterpolants, 0 QuantifiedInterpolants, 417448 SizeOfPredicates, 15 NumberOfNonLiveVariables, 2051 ConjunctsInSsa, 102 ConjunctsInUnsatCore, 20 InterpolantComputations, 10 PerfectInterpolantSequences, 271/825 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...