./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/locks/test_locks_13.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/locks/test_locks_13.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 837e2aefd0844822f4a3cad7b5ee89b7191bc2c1 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-19 22:24:36,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:24:36,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:24:36,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:24:36,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:24:36,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:24:36,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:24:36,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:24:36,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:24:36,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:24:36,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:24:36,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:24:36,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:24:36,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:24:36,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:24:37,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:24:37,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:24:37,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:24:37,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:24:37,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:24:37,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:24:37,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:24:37,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:24:37,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:24:37,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:24:37,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:24:37,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:24:37,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:24:37,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:24:37,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:24:37,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:24:37,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:24:37,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:24:37,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:24:37,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:24:37,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:24:37,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:24:37,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:24:37,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:24:37,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:24:37,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:24:37,057 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:24:37,099 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:24:37,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:24:37,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:24:37,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:24:37,102 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:24:37,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:24:37,102 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:24:37,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:24:37,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:24:37,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:24:37,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:24:37,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:24:37,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:24:37,105 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:24:37,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:24:37,105 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:24:37,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:24:37,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:24:37,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:24:37,107 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:24:37,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:24:37,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:24:37,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:24:37,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:24:37,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:24:37,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:24:37,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:24:37,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:24:37,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:24:37,109 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 -> 837e2aefd0844822f4a3cad7b5ee89b7191bc2c1 [2020-10-19 22:24:37,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:24:37,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:24:37,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:24:37,370 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:24:37,370 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:24:37,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_13.c [2020-10-19 22:24:37,468 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/010682a3e/bc6d4f274bf549e8b93e94ea0bb48fac/FLAG16feccc25 [2020-10-19 22:24:38,038 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:24:38,039 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_13.c [2020-10-19 22:24:38,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/010682a3e/bc6d4f274bf549e8b93e94ea0bb48fac/FLAG16feccc25 [2020-10-19 22:24:38,414 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/010682a3e/bc6d4f274bf549e8b93e94ea0bb48fac [2020-10-19 22:24:38,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:24:38,427 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:24:38,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:24:38,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:24:38,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:24:38,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:24:38" (1/1) ... [2020-10-19 22:24:38,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a4a13e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:38, skipping insertion in model container [2020-10-19 22:24:38,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:24:38" (1/1) ... [2020-10-19 22:24:38,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:24:38,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:24:38,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:24:38,730 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:24:38,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:24:38,775 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:24:38,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:38 WrapperNode [2020-10-19 22:24:38,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:24:38,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:24:38,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:24:38,777 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:24:38,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:38" (1/1) ... [2020-10-19 22:24:38,792 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:38" (1/1) ... [2020-10-19 22:24:38,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:24:38,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:24:38,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:24:38,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:24:38,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:38" (1/1) ... [2020-10-19 22:24:38,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:38" (1/1) ... [2020-10-19 22:24:38,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:38" (1/1) ... [2020-10-19 22:24:38,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:38" (1/1) ... [2020-10-19 22:24:38,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:38" (1/1) ... [2020-10-19 22:24:38,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:38" (1/1) ... [2020-10-19 22:24:38,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:38" (1/1) ... [2020-10-19 22:24:38,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:24:38,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:24:38,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:24:38,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:24:38,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:38" (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 [2020-10-19 22:24:38,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:24:38,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:24:38,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:24:38,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:24:39,355 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:24:39,355 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-19 22:24:39,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:24:39 BoogieIcfgContainer [2020-10-19 22:24:39,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:24:39,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:24:39,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:24:39,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:24:39,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:24:38" (1/3) ... [2020-10-19 22:24:39,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b006a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:24:39, skipping insertion in model container [2020-10-19 22:24:39,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:38" (2/3) ... [2020-10-19 22:24:39,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b006a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:24:39, skipping insertion in model container [2020-10-19 22:24:39,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:24:39" (3/3) ... [2020-10-19 22:24:39,368 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_13.c [2020-10-19 22:24:39,380 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:24:39,388 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:24:39,401 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:24:39,423 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:24:39,423 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:24:39,423 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:24:39,423 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:24:39,424 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:24:39,424 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:24:39,424 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:24:39,424 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:24:39,440 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-10-19 22:24:39,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 22:24:39,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:39,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:39,448 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:39,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:39,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1359894467, now seen corresponding path program 1 times [2020-10-19 22:24:39,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:39,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010480832] [2020-10-19 22:24:39,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:39,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:39,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010480832] [2020-10-19 22:24:39,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:39,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:39,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899675072] [2020-10-19 22:24:39,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:39,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:39,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:39,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:39,731 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-10-19 22:24:39,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:39,798 INFO L93 Difference]: Finished difference Result 102 states and 182 transitions. [2020-10-19 22:24:39,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:39,800 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-19 22:24:39,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:39,823 INFO L225 Difference]: With dead ends: 102 [2020-10-19 22:24:39,823 INFO L226 Difference]: Without dead ends: 87 [2020-10-19 22:24:39,829 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 [2020-10-19 22:24:39,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-19 22:24:39,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 59. [2020-10-19 22:24:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-19 22:24:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 110 transitions. [2020-10-19 22:24:39,874 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 110 transitions. Word has length 20 [2020-10-19 22:24:39,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:39,875 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 110 transitions. [2020-10-19 22:24:39,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:39,875 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 110 transitions. [2020-10-19 22:24:39,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 22:24:39,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:39,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:39,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:24:39,877 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:39,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:39,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1914004475, now seen corresponding path program 1 times [2020-10-19 22:24:39,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:39,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862094045] [2020-10-19 22:24:39,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:39,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862094045] [2020-10-19 22:24:39,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:39,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:39,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770722591] [2020-10-19 22:24:39,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:39,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:39,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:39,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:39,961 INFO L87 Difference]: Start difference. First operand 59 states and 110 transitions. Second operand 3 states. [2020-10-19 22:24:39,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:39,995 INFO L93 Difference]: Finished difference Result 144 states and 269 transitions. [2020-10-19 22:24:39,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:39,996 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-19 22:24:39,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:39,998 INFO L225 Difference]: With dead ends: 144 [2020-10-19 22:24:39,998 INFO L226 Difference]: Without dead ends: 87 [2020-10-19 22:24:40,000 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 [2020-10-19 22:24:40,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-19 22:24:40,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-10-19 22:24:40,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-19 22:24:40,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 158 transitions. [2020-10-19 22:24:40,011 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 158 transitions. Word has length 20 [2020-10-19 22:24:40,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:40,012 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 158 transitions. [2020-10-19 22:24:40,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:40,012 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 158 transitions. [2020-10-19 22:24:40,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 22:24:40,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:40,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:40,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 22:24:40,014 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:40,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:40,014 INFO L82 PathProgramCache]: Analyzing trace with hash 793156859, now seen corresponding path program 1 times [2020-10-19 22:24:40,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:40,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301224754] [2020-10-19 22:24:40,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:40,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301224754] [2020-10-19 22:24:40,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:40,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:40,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114898341] [2020-10-19 22:24:40,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:40,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:40,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:40,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:40,117 INFO L87 Difference]: Start difference. First operand 85 states and 158 transitions. Second operand 3 states. [2020-10-19 22:24:40,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:40,140 INFO L93 Difference]: Finished difference Result 132 states and 240 transitions. [2020-10-19 22:24:40,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:40,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-19 22:24:40,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:40,143 INFO L225 Difference]: With dead ends: 132 [2020-10-19 22:24:40,143 INFO L226 Difference]: Without dead ends: 90 [2020-10-19 22:24:40,144 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 [2020-10-19 22:24:40,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-19 22:24:40,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-10-19 22:24:40,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-19 22:24:40,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 160 transitions. [2020-10-19 22:24:40,164 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 160 transitions. Word has length 21 [2020-10-19 22:24:40,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:40,164 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 160 transitions. [2020-10-19 22:24:40,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:40,165 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 160 transitions. [2020-10-19 22:24:40,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 22:24:40,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:40,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:40,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 22:24:40,167 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:40,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:40,168 INFO L82 PathProgramCache]: Analyzing trace with hash -795191043, now seen corresponding path program 1 times [2020-10-19 22:24:40,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:40,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807722024] [2020-10-19 22:24:40,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:40,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807722024] [2020-10-19 22:24:40,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:40,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:40,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30633543] [2020-10-19 22:24:40,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:40,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:40,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:40,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:40,232 INFO L87 Difference]: Start difference. First operand 88 states and 160 transitions. Second operand 3 states. [2020-10-19 22:24:40,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:40,270 INFO L93 Difference]: Finished difference Result 169 states and 309 transitions. [2020-10-19 22:24:40,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:40,271 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-19 22:24:40,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:40,273 INFO L225 Difference]: With dead ends: 169 [2020-10-19 22:24:40,273 INFO L226 Difference]: Without dead ends: 167 [2020-10-19 22:24:40,273 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 [2020-10-19 22:24:40,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-19 22:24:40,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 117. [2020-10-19 22:24:40,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-19 22:24:40,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 213 transitions. [2020-10-19 22:24:40,296 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 213 transitions. Word has length 21 [2020-10-19 22:24:40,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:40,296 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 213 transitions. [2020-10-19 22:24:40,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:40,296 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 213 transitions. [2020-10-19 22:24:40,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 22:24:40,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:40,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:40,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 22:24:40,299 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:40,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:40,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1816259397, now seen corresponding path program 1 times [2020-10-19 22:24:40,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:40,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629858572] [2020-10-19 22:24:40,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:40,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629858572] [2020-10-19 22:24:40,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:40,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:40,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350420907] [2020-10-19 22:24:40,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:40,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:40,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:40,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:40,396 INFO L87 Difference]: Start difference. First operand 117 states and 213 transitions. Second operand 3 states. [2020-10-19 22:24:40,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:40,419 INFO L93 Difference]: Finished difference Result 281 states and 515 transitions. [2020-10-19 22:24:40,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:40,428 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-19 22:24:40,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:40,430 INFO L225 Difference]: With dead ends: 281 [2020-10-19 22:24:40,430 INFO L226 Difference]: Without dead ends: 169 [2020-10-19 22:24:40,432 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 [2020-10-19 22:24:40,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-19 22:24:40,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2020-10-19 22:24:40,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-19 22:24:40,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 303 transitions. [2020-10-19 22:24:40,446 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 303 transitions. Word has length 21 [2020-10-19 22:24:40,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:40,446 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 303 transitions. [2020-10-19 22:24:40,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:40,447 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 303 transitions. [2020-10-19 22:24:40,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 22:24:40,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:40,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:40,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 22:24:40,449 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:40,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:40,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1119094160, now seen corresponding path program 1 times [2020-10-19 22:24:40,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:40,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955117077] [2020-10-19 22:24:40,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:40,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955117077] [2020-10-19 22:24:40,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:40,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:40,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102320887] [2020-10-19 22:24:40,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:40,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:40,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:40,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:40,493 INFO L87 Difference]: Start difference. First operand 167 states and 303 transitions. Second operand 3 states. [2020-10-19 22:24:40,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:40,511 INFO L93 Difference]: Finished difference Result 252 states and 454 transitions. [2020-10-19 22:24:40,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:40,511 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-19 22:24:40,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:40,513 INFO L225 Difference]: With dead ends: 252 [2020-10-19 22:24:40,513 INFO L226 Difference]: Without dead ends: 171 [2020-10-19 22:24:40,514 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 [2020-10-19 22:24:40,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-19 22:24:40,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2020-10-19 22:24:40,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-19 22:24:40,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 303 transitions. [2020-10-19 22:24:40,529 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 303 transitions. Word has length 22 [2020-10-19 22:24:40,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:40,529 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 303 transitions. [2020-10-19 22:24:40,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:40,530 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 303 transitions. [2020-10-19 22:24:40,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 22:24:40,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:40,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:40,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 22:24:40,533 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:40,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:40,533 INFO L82 PathProgramCache]: Analyzing trace with hash -469253742, now seen corresponding path program 1 times [2020-10-19 22:24:40,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:40,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125667504] [2020-10-19 22:24:40,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:40,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125667504] [2020-10-19 22:24:40,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:40,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:40,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648017139] [2020-10-19 22:24:40,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:40,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:40,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:40,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:40,656 INFO L87 Difference]: Start difference. First operand 169 states and 303 transitions. Second operand 3 states. [2020-10-19 22:24:40,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:40,697 INFO L93 Difference]: Finished difference Result 489 states and 881 transitions. [2020-10-19 22:24:40,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:40,698 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-19 22:24:40,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:40,700 INFO L225 Difference]: With dead ends: 489 [2020-10-19 22:24:40,701 INFO L226 Difference]: Without dead ends: 327 [2020-10-19 22:24:40,702 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 [2020-10-19 22:24:40,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-19 22:24:40,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 325. [2020-10-19 22:24:40,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-19 22:24:40,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 579 transitions. [2020-10-19 22:24:40,723 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 579 transitions. Word has length 22 [2020-10-19 22:24:40,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:40,723 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 579 transitions. [2020-10-19 22:24:40,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:40,724 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 579 transitions. [2020-10-19 22:24:40,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 22:24:40,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:40,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:40,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 22:24:40,726 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:40,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:40,727 INFO L82 PathProgramCache]: Analyzing trace with hash 551814612, now seen corresponding path program 1 times [2020-10-19 22:24:40,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:40,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15375033] [2020-10-19 22:24:40,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:40,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15375033] [2020-10-19 22:24:40,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:40,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:40,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617359105] [2020-10-19 22:24:40,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:40,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:40,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:40,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:40,764 INFO L87 Difference]: Start difference. First operand 325 states and 579 transitions. Second operand 3 states. [2020-10-19 22:24:40,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:40,783 INFO L93 Difference]: Finished difference Result 417 states and 749 transitions. [2020-10-19 22:24:40,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:40,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-19 22:24:40,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:40,786 INFO L225 Difference]: With dead ends: 417 [2020-10-19 22:24:40,786 INFO L226 Difference]: Without dead ends: 415 [2020-10-19 22:24:40,787 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 [2020-10-19 22:24:40,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2020-10-19 22:24:40,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 325. [2020-10-19 22:24:40,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-19 22:24:40,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 575 transitions. [2020-10-19 22:24:40,803 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 575 transitions. Word has length 22 [2020-10-19 22:24:40,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:40,803 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 575 transitions. [2020-10-19 22:24:40,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:40,804 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 575 transitions. [2020-10-19 22:24:40,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 22:24:40,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:40,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:40,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 22:24:40,806 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:40,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:40,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1661751056, now seen corresponding path program 1 times [2020-10-19 22:24:40,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:40,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262280005] [2020-10-19 22:24:40,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:40,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262280005] [2020-10-19 22:24:40,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:40,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:40,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251340161] [2020-10-19 22:24:40,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:40,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:40,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:40,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:40,874 INFO L87 Difference]: Start difference. First operand 325 states and 575 transitions. Second operand 3 states. [2020-10-19 22:24:40,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:40,914 INFO L93 Difference]: Finished difference Result 613 states and 1097 transitions. [2020-10-19 22:24:40,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:40,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-19 22:24:40,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:40,919 INFO L225 Difference]: With dead ends: 613 [2020-10-19 22:24:40,924 INFO L226 Difference]: Without dead ends: 611 [2020-10-19 22:24:40,925 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 [2020-10-19 22:24:40,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2020-10-19 22:24:40,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 449. [2020-10-19 22:24:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-10-19 22:24:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 783 transitions. [2020-10-19 22:24:40,953 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 783 transitions. Word has length 23 [2020-10-19 22:24:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:40,954 INFO L481 AbstractCegarLoop]: Abstraction has 449 states and 783 transitions. [2020-10-19 22:24:40,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:40,955 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 783 transitions. [2020-10-19 22:24:40,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 22:24:40,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:40,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:40,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-19 22:24:40,963 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:40,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:40,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1612147886, now seen corresponding path program 1 times [2020-10-19 22:24:40,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:40,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282674611] [2020-10-19 22:24:40,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:40,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282674611] [2020-10-19 22:24:40,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:40,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:40,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582760742] [2020-10-19 22:24:41,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:41,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:41,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:41,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:41,001 INFO L87 Difference]: Start difference. First operand 449 states and 783 transitions. Second operand 3 states. [2020-10-19 22:24:41,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:41,026 INFO L93 Difference]: Finished difference Result 1077 states and 1889 transitions. [2020-10-19 22:24:41,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:41,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-19 22:24:41,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:41,031 INFO L225 Difference]: With dead ends: 1077 [2020-10-19 22:24:41,031 INFO L226 Difference]: Without dead ends: 635 [2020-10-19 22:24:41,032 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 [2020-10-19 22:24:41,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2020-10-19 22:24:41,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 633. [2020-10-19 22:24:41,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2020-10-19 22:24:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1099 transitions. [2020-10-19 22:24:41,070 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1099 transitions. Word has length 23 [2020-10-19 22:24:41,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:41,070 INFO L481 AbstractCegarLoop]: Abstraction has 633 states and 1099 transitions. [2020-10-19 22:24:41,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:41,071 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1099 transitions. [2020-10-19 22:24:41,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 22:24:41,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:41,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:41,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-19 22:24:41,073 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:41,073 INFO L82 PathProgramCache]: Analyzing trace with hash 25538215, now seen corresponding path program 1 times [2020-10-19 22:24:41,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:41,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979742868] [2020-10-19 22:24:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:41,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979742868] [2020-10-19 22:24:41,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:41,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:41,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604355436] [2020-10-19 22:24:41,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:41,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:41,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:41,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:41,105 INFO L87 Difference]: Start difference. First operand 633 states and 1099 transitions. Second operand 3 states. [2020-10-19 22:24:41,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:41,131 INFO L93 Difference]: Finished difference Result 957 states and 1657 transitions. [2020-10-19 22:24:41,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:41,131 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-19 22:24:41,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:41,135 INFO L225 Difference]: With dead ends: 957 [2020-10-19 22:24:41,135 INFO L226 Difference]: Without dead ends: 647 [2020-10-19 22:24:41,136 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 [2020-10-19 22:24:41,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2020-10-19 22:24:41,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 645. [2020-10-19 22:24:41,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2020-10-19 22:24:41,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1107 transitions. [2020-10-19 22:24:41,155 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1107 transitions. Word has length 24 [2020-10-19 22:24:41,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:41,155 INFO L481 AbstractCegarLoop]: Abstraction has 645 states and 1107 transitions. [2020-10-19 22:24:41,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:41,156 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1107 transitions. [2020-10-19 22:24:41,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 22:24:41,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:41,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:41,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-19 22:24:41,157 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:41,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:41,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1562809687, now seen corresponding path program 1 times [2020-10-19 22:24:41,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:41,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964634222] [2020-10-19 22:24:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:41,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964634222] [2020-10-19 22:24:41,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:41,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:41,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339223903] [2020-10-19 22:24:41,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:41,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:41,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:41,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:41,208 INFO L87 Difference]: Start difference. First operand 645 states and 1107 transitions. Second operand 3 states. [2020-10-19 22:24:41,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:41,233 INFO L93 Difference]: Finished difference Result 1193 states and 2077 transitions. [2020-10-19 22:24:41,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:41,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-19 22:24:41,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:41,240 INFO L225 Difference]: With dead ends: 1193 [2020-10-19 22:24:41,241 INFO L226 Difference]: Without dead ends: 1191 [2020-10-19 22:24:41,242 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 [2020-10-19 22:24:41,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2020-10-19 22:24:41,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 901. [2020-10-19 22:24:41,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 901 states. [2020-10-19 22:24:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1515 transitions. [2020-10-19 22:24:41,266 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1515 transitions. Word has length 24 [2020-10-19 22:24:41,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:41,266 INFO L481 AbstractCegarLoop]: Abstraction has 901 states and 1515 transitions. [2020-10-19 22:24:41,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:41,267 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1515 transitions. [2020-10-19 22:24:41,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 22:24:41,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:41,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:41,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-19 22:24:41,269 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:41,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:41,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1711089255, now seen corresponding path program 1 times [2020-10-19 22:24:41,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:41,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314044790] [2020-10-19 22:24:41,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:41,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314044790] [2020-10-19 22:24:41,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:41,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:41,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275633308] [2020-10-19 22:24:41,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:41,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:41,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:41,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:41,305 INFO L87 Difference]: Start difference. First operand 901 states and 1515 transitions. Second operand 3 states. [2020-10-19 22:24:41,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:41,352 INFO L93 Difference]: Finished difference Result 2137 states and 3613 transitions. [2020-10-19 22:24:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:41,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-19 22:24:41,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:41,364 INFO L225 Difference]: With dead ends: 2137 [2020-10-19 22:24:41,365 INFO L226 Difference]: Without dead ends: 1255 [2020-10-19 22:24:41,367 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 [2020-10-19 22:24:41,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2020-10-19 22:24:41,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1253. [2020-10-19 22:24:41,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1253 states. [2020-10-19 22:24:41,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 2099 transitions. [2020-10-19 22:24:41,403 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 2099 transitions. Word has length 24 [2020-10-19 22:24:41,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:41,405 INFO L481 AbstractCegarLoop]: Abstraction has 1253 states and 2099 transitions. [2020-10-19 22:24:41,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 2099 transitions. [2020-10-19 22:24:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 22:24:41,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:41,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:41,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-19 22:24:41,409 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:41,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:41,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1202246301, now seen corresponding path program 1 times [2020-10-19 22:24:41,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:41,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477550092] [2020-10-19 22:24:41,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:41,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477550092] [2020-10-19 22:24:41,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:41,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:41,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730758228] [2020-10-19 22:24:41,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:41,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:41,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:41,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:41,466 INFO L87 Difference]: Start difference. First operand 1253 states and 2099 transitions. Second operand 3 states. [2020-10-19 22:24:41,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:41,506 INFO L93 Difference]: Finished difference Result 1881 states and 3141 transitions. [2020-10-19 22:24:41,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:41,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-19 22:24:41,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:41,514 INFO L225 Difference]: With dead ends: 1881 [2020-10-19 22:24:41,514 INFO L226 Difference]: Without dead ends: 1271 [2020-10-19 22:24:41,517 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 [2020-10-19 22:24:41,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2020-10-19 22:24:41,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1269. [2020-10-19 22:24:41,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1269 states. [2020-10-19 22:24:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 2099 transitions. [2020-10-19 22:24:41,554 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 2099 transitions. Word has length 25 [2020-10-19 22:24:41,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:41,555 INFO L481 AbstractCegarLoop]: Abstraction has 1269 states and 2099 transitions. [2020-10-19 22:24:41,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:41,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 2099 transitions. [2020-10-19 22:24:41,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 22:24:41,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:41,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:41,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-19 22:24:41,557 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:41,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:41,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1504373093, now seen corresponding path program 1 times [2020-10-19 22:24:41,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:41,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354354109] [2020-10-19 22:24:41,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:41,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354354109] [2020-10-19 22:24:41,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:41,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:41,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294422234] [2020-10-19 22:24:41,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:41,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:41,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:41,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:41,596 INFO L87 Difference]: Start difference. First operand 1269 states and 2099 transitions. Second operand 3 states. [2020-10-19 22:24:41,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:41,629 INFO L93 Difference]: Finished difference Result 2313 states and 3893 transitions. [2020-10-19 22:24:41,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:41,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-19 22:24:41,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:41,640 INFO L225 Difference]: With dead ends: 2313 [2020-10-19 22:24:41,640 INFO L226 Difference]: Without dead ends: 2311 [2020-10-19 22:24:41,643 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 [2020-10-19 22:24:41,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2020-10-19 22:24:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 1797. [2020-10-19 22:24:41,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1797 states. [2020-10-19 22:24:41,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 2899 transitions. [2020-10-19 22:24:41,719 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 2899 transitions. Word has length 25 [2020-10-19 22:24:41,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:41,719 INFO L481 AbstractCegarLoop]: Abstraction has 1797 states and 2899 transitions. [2020-10-19 22:24:41,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:41,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 2899 transitions. [2020-10-19 22:24:41,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 22:24:41,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:41,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:41,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-19 22:24:41,722 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:41,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:41,723 INFO L82 PathProgramCache]: Analyzing trace with hash 483304739, now seen corresponding path program 1 times [2020-10-19 22:24:41,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:41,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933188552] [2020-10-19 22:24:41,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:41,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:41,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933188552] [2020-10-19 22:24:41,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:41,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:41,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261560878] [2020-10-19 22:24:41,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:41,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:41,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:41,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:41,764 INFO L87 Difference]: Start difference. First operand 1797 states and 2899 transitions. Second operand 3 states. [2020-10-19 22:24:41,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:41,839 INFO L93 Difference]: Finished difference Result 4233 states and 6869 transitions. [2020-10-19 22:24:41,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:41,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-19 22:24:41,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:41,856 INFO L225 Difference]: With dead ends: 4233 [2020-10-19 22:24:41,856 INFO L226 Difference]: Without dead ends: 2471 [2020-10-19 22:24:41,860 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 [2020-10-19 22:24:41,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2020-10-19 22:24:41,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2469. [2020-10-19 22:24:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2469 states. [2020-10-19 22:24:41,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 3971 transitions. [2020-10-19 22:24:41,957 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 3971 transitions. Word has length 25 [2020-10-19 22:24:41,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:41,957 INFO L481 AbstractCegarLoop]: Abstraction has 2469 states and 3971 transitions. [2020-10-19 22:24:41,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:41,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 3971 transitions. [2020-10-19 22:24:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 22:24:41,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:41,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:41,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-19 22:24:41,964 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:41,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:41,965 INFO L82 PathProgramCache]: Analyzing trace with hash -608860292, now seen corresponding path program 1 times [2020-10-19 22:24:41,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:41,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047846848] [2020-10-19 22:24:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:42,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047846848] [2020-10-19 22:24:42,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:42,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:42,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587568856] [2020-10-19 22:24:42,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:42,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:42,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:42,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:42,054 INFO L87 Difference]: Start difference. First operand 2469 states and 3971 transitions. Second operand 3 states. [2020-10-19 22:24:42,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:42,102 INFO L93 Difference]: Finished difference Result 3705 states and 5941 transitions. [2020-10-19 22:24:42,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:42,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-10-19 22:24:42,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:42,118 INFO L225 Difference]: With dead ends: 3705 [2020-10-19 22:24:42,118 INFO L226 Difference]: Without dead ends: 2503 [2020-10-19 22:24:42,120 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 [2020-10-19 22:24:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2020-10-19 22:24:42,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 2501. [2020-10-19 22:24:42,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2501 states. [2020-10-19 22:24:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 3971 transitions. [2020-10-19 22:24:42,198 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 3971 transitions. Word has length 26 [2020-10-19 22:24:42,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:42,199 INFO L481 AbstractCegarLoop]: Abstraction has 2501 states and 3971 transitions. [2020-10-19 22:24:42,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 3971 transitions. [2020-10-19 22:24:42,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 22:24:42,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:42,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:42,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-19 22:24:42,203 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:42,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:42,203 INFO L82 PathProgramCache]: Analyzing trace with hash 2097759102, now seen corresponding path program 1 times [2020-10-19 22:24:42,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:42,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611447642] [2020-10-19 22:24:42,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:42,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611447642] [2020-10-19 22:24:42,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:42,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:42,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382597756] [2020-10-19 22:24:42,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:42,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:42,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:42,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:42,254 INFO L87 Difference]: Start difference. First operand 2501 states and 3971 transitions. Second operand 3 states. [2020-10-19 22:24:42,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:42,313 INFO L93 Difference]: Finished difference Result 4489 states and 7269 transitions. [2020-10-19 22:24:42,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:42,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-10-19 22:24:42,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:42,337 INFO L225 Difference]: With dead ends: 4489 [2020-10-19 22:24:42,337 INFO L226 Difference]: Without dead ends: 4487 [2020-10-19 22:24:42,340 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 [2020-10-19 22:24:42,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4487 states. [2020-10-19 22:24:42,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4487 to 3589. [2020-10-19 22:24:42,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3589 states. [2020-10-19 22:24:42,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3589 states to 3589 states and 5539 transitions. [2020-10-19 22:24:42,493 INFO L78 Accepts]: Start accepts. Automaton has 3589 states and 5539 transitions. Word has length 26 [2020-10-19 22:24:42,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:42,494 INFO L481 AbstractCegarLoop]: Abstraction has 3589 states and 5539 transitions. [2020-10-19 22:24:42,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:42,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3589 states and 5539 transitions. [2020-10-19 22:24:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 22:24:42,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:42,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:42,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-19 22:24:42,501 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:42,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:42,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1076690748, now seen corresponding path program 1 times [2020-10-19 22:24:42,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:42,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846808450] [2020-10-19 22:24:42,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:42,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846808450] [2020-10-19 22:24:42,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:42,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:42,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710069343] [2020-10-19 22:24:42,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:42,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:42,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:42,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:42,527 INFO L87 Difference]: Start difference. First operand 3589 states and 5539 transitions. Second operand 3 states. [2020-10-19 22:24:42,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:42,662 INFO L93 Difference]: Finished difference Result 8393 states and 13029 transitions. [2020-10-19 22:24:42,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:42,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-10-19 22:24:42,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:42,721 INFO L225 Difference]: With dead ends: 8393 [2020-10-19 22:24:42,721 INFO L226 Difference]: Without dead ends: 4871 [2020-10-19 22:24:42,730 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 [2020-10-19 22:24:42,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2020-10-19 22:24:43,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 4869. [2020-10-19 22:24:43,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4869 states. [2020-10-19 22:24:43,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4869 states to 4869 states and 7491 transitions. [2020-10-19 22:24:43,168 INFO L78 Accepts]: Start accepts. Automaton has 4869 states and 7491 transitions. Word has length 26 [2020-10-19 22:24:43,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:43,168 INFO L481 AbstractCegarLoop]: Abstraction has 4869 states and 7491 transitions. [2020-10-19 22:24:43,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:43,169 INFO L276 IsEmpty]: Start isEmpty. Operand 4869 states and 7491 transitions. [2020-10-19 22:24:43,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 22:24:43,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:43,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:43,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-19 22:24:43,174 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:43,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:43,175 INFO L82 PathProgramCache]: Analyzing trace with hash 606237144, now seen corresponding path program 1 times [2020-10-19 22:24:43,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:43,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96963405] [2020-10-19 22:24:43,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:43,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96963405] [2020-10-19 22:24:43,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:43,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:43,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550173236] [2020-10-19 22:24:43,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:43,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:43,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:43,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:43,197 INFO L87 Difference]: Start difference. First operand 4869 states and 7491 transitions. Second operand 3 states. [2020-10-19 22:24:43,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:43,264 INFO L93 Difference]: Finished difference Result 7305 states and 11205 transitions. [2020-10-19 22:24:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:43,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-19 22:24:43,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:43,276 INFO L225 Difference]: With dead ends: 7305 [2020-10-19 22:24:43,276 INFO L226 Difference]: Without dead ends: 4935 [2020-10-19 22:24:43,280 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 [2020-10-19 22:24:43,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4935 states. [2020-10-19 22:24:43,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4935 to 4933. [2020-10-19 22:24:43,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4933 states. [2020-10-19 22:24:43,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4933 states to 4933 states and 7491 transitions. [2020-10-19 22:24:43,452 INFO L78 Accepts]: Start accepts. Automaton has 4933 states and 7491 transitions. Word has length 27 [2020-10-19 22:24:43,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:43,452 INFO L481 AbstractCegarLoop]: Abstraction has 4933 states and 7491 transitions. [2020-10-19 22:24:43,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:43,452 INFO L276 IsEmpty]: Start isEmpty. Operand 4933 states and 7491 transitions. [2020-10-19 22:24:43,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 22:24:43,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:43,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:43,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-19 22:24:43,458 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:43,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:43,458 INFO L82 PathProgramCache]: Analyzing trace with hash -982110758, now seen corresponding path program 1 times [2020-10-19 22:24:43,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:43,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820756478] [2020-10-19 22:24:43,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:43,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:43,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820756478] [2020-10-19 22:24:43,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:43,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:43,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287240725] [2020-10-19 22:24:43,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:43,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:43,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:43,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:43,481 INFO L87 Difference]: Start difference. First operand 4933 states and 7491 transitions. Second operand 3 states. [2020-10-19 22:24:43,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:43,698 INFO L93 Difference]: Finished difference Result 8713 states and 13509 transitions. [2020-10-19 22:24:43,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:43,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-19 22:24:43,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:43,716 INFO L225 Difference]: With dead ends: 8713 [2020-10-19 22:24:43,716 INFO L226 Difference]: Without dead ends: 8711 [2020-10-19 22:24:43,718 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 [2020-10-19 22:24:43,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8711 states. [2020-10-19 22:24:43,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8711 to 7173. [2020-10-19 22:24:43,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7173 states. [2020-10-19 22:24:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7173 states to 7173 states and 10563 transitions. [2020-10-19 22:24:43,897 INFO L78 Accepts]: Start accepts. Automaton has 7173 states and 10563 transitions. Word has length 27 [2020-10-19 22:24:43,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:43,897 INFO L481 AbstractCegarLoop]: Abstraction has 7173 states and 10563 transitions. [2020-10-19 22:24:43,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:43,897 INFO L276 IsEmpty]: Start isEmpty. Operand 7173 states and 10563 transitions. [2020-10-19 22:24:43,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 22:24:43,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:43,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:43,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-19 22:24:43,936 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:43,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:43,936 INFO L82 PathProgramCache]: Analyzing trace with hash -2003179112, now seen corresponding path program 1 times [2020-10-19 22:24:43,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:43,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044788592] [2020-10-19 22:24:43,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:43,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044788592] [2020-10-19 22:24:43,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:43,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:43,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310824588] [2020-10-19 22:24:43,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:43,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:43,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:43,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:43,958 INFO L87 Difference]: Start difference. First operand 7173 states and 10563 transitions. Second operand 3 states. [2020-10-19 22:24:44,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:44,085 INFO L93 Difference]: Finished difference Result 16649 states and 24645 transitions. [2020-10-19 22:24:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:44,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-19 22:24:44,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:44,105 INFO L225 Difference]: With dead ends: 16649 [2020-10-19 22:24:44,105 INFO L226 Difference]: Without dead ends: 9607 [2020-10-19 22:24:44,116 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 [2020-10-19 22:24:44,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9607 states. [2020-10-19 22:24:44,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9607 to 9605. [2020-10-19 22:24:44,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9605 states. [2020-10-19 22:24:44,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9605 states to 9605 states and 14083 transitions. [2020-10-19 22:24:44,603 INFO L78 Accepts]: Start accepts. Automaton has 9605 states and 14083 transitions. Word has length 27 [2020-10-19 22:24:44,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:44,604 INFO L481 AbstractCegarLoop]: Abstraction has 9605 states and 14083 transitions. [2020-10-19 22:24:44,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:44,604 INFO L276 IsEmpty]: Start isEmpty. Operand 9605 states and 14083 transitions. [2020-10-19 22:24:44,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 22:24:44,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:44,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:44,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-19 22:24:44,613 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:44,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:44,614 INFO L82 PathProgramCache]: Analyzing trace with hash -380447663, now seen corresponding path program 1 times [2020-10-19 22:24:44,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:44,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403234685] [2020-10-19 22:24:44,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:44,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:44,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403234685] [2020-10-19 22:24:44,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:44,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:44,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72449167] [2020-10-19 22:24:44,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:44,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:44,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:44,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:44,639 INFO L87 Difference]: Start difference. First operand 9605 states and 14083 transitions. Second operand 3 states. [2020-10-19 22:24:44,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:44,786 INFO L93 Difference]: Finished difference Result 14409 states and 21061 transitions. [2020-10-19 22:24:44,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:44,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-10-19 22:24:44,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:44,808 INFO L225 Difference]: With dead ends: 14409 [2020-10-19 22:24:44,808 INFO L226 Difference]: Without dead ends: 9735 [2020-10-19 22:24:44,818 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 [2020-10-19 22:24:44,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9735 states. [2020-10-19 22:24:45,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9735 to 9733. [2020-10-19 22:24:45,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9733 states. [2020-10-19 22:24:45,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9733 states to 9733 states and 14083 transitions. [2020-10-19 22:24:45,190 INFO L78 Accepts]: Start accepts. Automaton has 9733 states and 14083 transitions. Word has length 28 [2020-10-19 22:24:45,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:45,190 INFO L481 AbstractCegarLoop]: Abstraction has 9733 states and 14083 transitions. [2020-10-19 22:24:45,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:45,190 INFO L276 IsEmpty]: Start isEmpty. Operand 9733 states and 14083 transitions. [2020-10-19 22:24:45,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 22:24:45,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:45,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:45,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-19 22:24:45,205 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:45,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:45,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1968795565, now seen corresponding path program 1 times [2020-10-19 22:24:45,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:45,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362465359] [2020-10-19 22:24:45,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:45,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362465359] [2020-10-19 22:24:45,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:45,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:45,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18715667] [2020-10-19 22:24:45,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:45,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:45,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:45,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:45,231 INFO L87 Difference]: Start difference. First operand 9733 states and 14083 transitions. Second operand 3 states. [2020-10-19 22:24:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:45,596 INFO L93 Difference]: Finished difference Result 16905 states and 24965 transitions. [2020-10-19 22:24:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:45,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-10-19 22:24:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:45,659 INFO L225 Difference]: With dead ends: 16905 [2020-10-19 22:24:45,659 INFO L226 Difference]: Without dead ends: 16903 [2020-10-19 22:24:45,663 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 [2020-10-19 22:24:45,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16903 states. [2020-10-19 22:24:45,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16903 to 14341. [2020-10-19 22:24:45,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14341 states. [2020-10-19 22:24:46,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14341 states to 14341 states and 20099 transitions. [2020-10-19 22:24:46,007 INFO L78 Accepts]: Start accepts. Automaton has 14341 states and 20099 transitions. Word has length 28 [2020-10-19 22:24:46,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:46,007 INFO L481 AbstractCegarLoop]: Abstraction has 14341 states and 20099 transitions. [2020-10-19 22:24:46,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:46,008 INFO L276 IsEmpty]: Start isEmpty. Operand 14341 states and 20099 transitions. [2020-10-19 22:24:46,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 22:24:46,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:46,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:46,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-19 22:24:46,029 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:46,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:46,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1305103377, now seen corresponding path program 1 times [2020-10-19 22:24:46,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:46,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861312539] [2020-10-19 22:24:46,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:46,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:46,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861312539] [2020-10-19 22:24:46,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:46,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:46,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811261199] [2020-10-19 22:24:46,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:46,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:46,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:46,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:46,099 INFO L87 Difference]: Start difference. First operand 14341 states and 20099 transitions. Second operand 3 states. [2020-10-19 22:24:46,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:46,623 INFO L93 Difference]: Finished difference Result 33033 states and 46469 transitions. [2020-10-19 22:24:46,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:46,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-10-19 22:24:46,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:46,656 INFO L225 Difference]: With dead ends: 33033 [2020-10-19 22:24:46,656 INFO L226 Difference]: Without dead ends: 18951 [2020-10-19 22:24:46,670 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 [2020-10-19 22:24:46,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18951 states. [2020-10-19 22:24:47,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18951 to 18949. [2020-10-19 22:24:47,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18949 states. [2020-10-19 22:24:47,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18949 states to 18949 states and 26371 transitions. [2020-10-19 22:24:47,101 INFO L78 Accepts]: Start accepts. Automaton has 18949 states and 26371 transitions. Word has length 28 [2020-10-19 22:24:47,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:47,101 INFO L481 AbstractCegarLoop]: Abstraction has 18949 states and 26371 transitions. [2020-10-19 22:24:47,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:47,102 INFO L276 IsEmpty]: Start isEmpty. Operand 18949 states and 26371 transitions. [2020-10-19 22:24:47,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-19 22:24:47,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:47,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:47,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-19 22:24:47,120 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:47,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:47,120 INFO L82 PathProgramCache]: Analyzing trace with hash -902905267, now seen corresponding path program 1 times [2020-10-19 22:24:47,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:47,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813366555] [2020-10-19 22:24:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:47,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813366555] [2020-10-19 22:24:47,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:47,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:47,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898840923] [2020-10-19 22:24:47,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:47,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:47,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:47,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:47,148 INFO L87 Difference]: Start difference. First operand 18949 states and 26371 transitions. Second operand 3 states. [2020-10-19 22:24:47,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:47,625 INFO L93 Difference]: Finished difference Result 28425 states and 39429 transitions. [2020-10-19 22:24:47,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:47,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-19 22:24:47,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:47,660 INFO L225 Difference]: With dead ends: 28425 [2020-10-19 22:24:47,660 INFO L226 Difference]: Without dead ends: 19207 [2020-10-19 22:24:47,674 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 [2020-10-19 22:24:47,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19207 states. [2020-10-19 22:24:48,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19207 to 19205. [2020-10-19 22:24:48,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19205 states. [2020-10-19 22:24:48,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19205 states to 19205 states and 26371 transitions. [2020-10-19 22:24:48,073 INFO L78 Accepts]: Start accepts. Automaton has 19205 states and 26371 transitions. Word has length 29 [2020-10-19 22:24:48,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:48,073 INFO L481 AbstractCegarLoop]: Abstraction has 19205 states and 26371 transitions. [2020-10-19 22:24:48,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:48,073 INFO L276 IsEmpty]: Start isEmpty. Operand 19205 states and 26371 transitions. [2020-10-19 22:24:48,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-19 22:24:48,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:48,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:48,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-19 22:24:48,092 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:48,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:48,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1803714127, now seen corresponding path program 1 times [2020-10-19 22:24:48,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:48,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188908676] [2020-10-19 22:24:48,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:48,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188908676] [2020-10-19 22:24:48,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:48,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:48,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631681969] [2020-10-19 22:24:48,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:48,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:48,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:48,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:48,113 INFO L87 Difference]: Start difference. First operand 19205 states and 26371 transitions. Second operand 3 states. [2020-10-19 22:24:48,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:48,722 INFO L93 Difference]: Finished difference Result 32777 states and 45829 transitions. [2020-10-19 22:24:48,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:48,722 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-19 22:24:48,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:48,780 INFO L225 Difference]: With dead ends: 32777 [2020-10-19 22:24:48,781 INFO L226 Difference]: Without dead ends: 32775 [2020-10-19 22:24:48,786 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 [2020-10-19 22:24:48,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32775 states. [2020-10-19 22:24:49,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32775 to 28677. [2020-10-19 22:24:49,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28677 states. [2020-10-19 22:24:49,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28677 states to 28677 states and 38147 transitions. [2020-10-19 22:24:49,458 INFO L78 Accepts]: Start accepts. Automaton has 28677 states and 38147 transitions. Word has length 29 [2020-10-19 22:24:49,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:49,458 INFO L481 AbstractCegarLoop]: Abstraction has 28677 states and 38147 transitions. [2020-10-19 22:24:49,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:49,459 INFO L276 IsEmpty]: Start isEmpty. Operand 28677 states and 38147 transitions. [2020-10-19 22:24:49,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-19 22:24:49,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:49,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:49,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-19 22:24:49,487 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:49,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:49,488 INFO L82 PathProgramCache]: Analyzing trace with hash 782645773, now seen corresponding path program 1 times [2020-10-19 22:24:49,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:49,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094734321] [2020-10-19 22:24:49,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:49,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094734321] [2020-10-19 22:24:49,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:49,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:49,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367294318] [2020-10-19 22:24:49,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:49,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:49,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:49,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:49,515 INFO L87 Difference]: Start difference. First operand 28677 states and 38147 transitions. Second operand 3 states. [2020-10-19 22:24:50,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:50,309 INFO L93 Difference]: Finished difference Result 65545 states and 87301 transitions. [2020-10-19 22:24:50,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:50,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-19 22:24:50,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:50,494 INFO L225 Difference]: With dead ends: 65545 [2020-10-19 22:24:50,494 INFO L226 Difference]: Without dead ends: 37383 [2020-10-19 22:24:50,526 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 [2020-10-19 22:24:50,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37383 states. [2020-10-19 22:24:51,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37383 to 37381. [2020-10-19 22:24:51,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37381 states. [2020-10-19 22:24:52,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37381 states to 37381 states and 49155 transitions. [2020-10-19 22:24:52,250 INFO L78 Accepts]: Start accepts. Automaton has 37381 states and 49155 transitions. Word has length 29 [2020-10-19 22:24:52,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:52,250 INFO L481 AbstractCegarLoop]: Abstraction has 37381 states and 49155 transitions. [2020-10-19 22:24:52,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:52,251 INFO L276 IsEmpty]: Start isEmpty. Operand 37381 states and 49155 transitions. [2020-10-19 22:24:52,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-19 22:24:52,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:52,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:52,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-19 22:24:52,277 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:52,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:52,278 INFO L82 PathProgramCache]: Analyzing trace with hash 80778534, now seen corresponding path program 1 times [2020-10-19 22:24:52,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:52,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816876735] [2020-10-19 22:24:52,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:52,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816876735] [2020-10-19 22:24:52,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:52,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:52,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192467701] [2020-10-19 22:24:52,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:52,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:52,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:52,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:52,307 INFO L87 Difference]: Start difference. First operand 37381 states and 49155 transitions. Second operand 3 states. [2020-10-19 22:24:52,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:52,807 INFO L93 Difference]: Finished difference Result 56073 states and 73477 transitions. [2020-10-19 22:24:52,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:52,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-10-19 22:24:52,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:52,851 INFO L225 Difference]: With dead ends: 56073 [2020-10-19 22:24:52,851 INFO L226 Difference]: Without dead ends: 37895 [2020-10-19 22:24:52,868 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 [2020-10-19 22:24:52,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37895 states. [2020-10-19 22:24:54,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37895 to 37893. [2020-10-19 22:24:54,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37893 states. [2020-10-19 22:24:54,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37893 states to 37893 states and 49155 transitions. [2020-10-19 22:24:54,308 INFO L78 Accepts]: Start accepts. Automaton has 37893 states and 49155 transitions. Word has length 30 [2020-10-19 22:24:54,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:54,308 INFO L481 AbstractCegarLoop]: Abstraction has 37893 states and 49155 transitions. [2020-10-19 22:24:54,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:54,309 INFO L276 IsEmpty]: Start isEmpty. Operand 37893 states and 49155 transitions. [2020-10-19 22:24:54,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-19 22:24:54,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:54,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:54,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-19 22:24:54,431 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:54,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:54,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1507569368, now seen corresponding path program 1 times [2020-10-19 22:24:54,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:54,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555482048] [2020-10-19 22:24:54,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:54,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555482048] [2020-10-19 22:24:54,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:54,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:54,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955969059] [2020-10-19 22:24:54,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:54,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:54,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:54,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:54,457 INFO L87 Difference]: Start difference. First operand 37893 states and 49155 transitions. Second operand 3 states. [2020-10-19 22:24:55,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:55,392 INFO L93 Difference]: Finished difference Result 110601 states and 141317 transitions. [2020-10-19 22:24:55,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:55,393 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-10-19 22:24:55,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:55,490 INFO L225 Difference]: With dead ends: 110601 [2020-10-19 22:24:55,490 INFO L226 Difference]: Without dead ends: 73735 [2020-10-19 22:24:55,527 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 [2020-10-19 22:24:55,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73735 states. [2020-10-19 22:24:57,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73735 to 73733. [2020-10-19 22:24:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73733 states. [2020-10-19 22:24:57,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73733 states to 73733 states and 92163 transitions. [2020-10-19 22:24:57,662 INFO L78 Accepts]: Start accepts. Automaton has 73733 states and 92163 transitions. Word has length 30 [2020-10-19 22:24:57,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:57,662 INFO L481 AbstractCegarLoop]: Abstraction has 73733 states and 92163 transitions. [2020-10-19 22:24:57,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:57,662 INFO L276 IsEmpty]: Start isEmpty. Operand 73733 states and 92163 transitions. [2020-10-19 22:24:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-19 22:24:57,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:57,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:57,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-19 22:24:57,706 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:57,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:57,706 INFO L82 PathProgramCache]: Analyzing trace with hash -486501014, now seen corresponding path program 1 times [2020-10-19 22:24:57,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:57,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601903075] [2020-10-19 22:24:57,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:57,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601903075] [2020-10-19 22:24:57,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:57,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:57,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157376489] [2020-10-19 22:24:57,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:57,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:57,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:57,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:57,729 INFO L87 Difference]: Start difference. First operand 73733 states and 92163 transitions. Second operand 3 states. [2020-10-19 22:24:59,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:59,553 INFO L93 Difference]: Finished difference Result 79881 states and 102405 transitions. [2020-10-19 22:24:59,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:59,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-10-19 22:24:59,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:59,637 INFO L225 Difference]: With dead ends: 79881 [2020-10-19 22:24:59,637 INFO L226 Difference]: Without dead ends: 79879 [2020-10-19 22:24:59,651 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 [2020-10-19 22:24:59,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79879 states. [2020-10-19 22:25:00,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79879 to 73733. [2020-10-19 22:25:00,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73733 states. [2020-10-19 22:25:00,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73733 states to 73733 states and 91139 transitions. [2020-10-19 22:25:00,673 INFO L78 Accepts]: Start accepts. Automaton has 73733 states and 91139 transitions. Word has length 30 [2020-10-19 22:25:00,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:25:00,673 INFO L481 AbstractCegarLoop]: Abstraction has 73733 states and 91139 transitions. [2020-10-19 22:25:00,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:25:00,673 INFO L276 IsEmpty]: Start isEmpty. Operand 73733 states and 91139 transitions. [2020-10-19 22:25:01,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 22:25:01,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:25:01,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:25:01,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-19 22:25:01,591 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:25:01,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:25:01,593 INFO L82 PathProgramCache]: Analyzing trace with hash 510205634, now seen corresponding path program 1 times [2020-10-19 22:25:01,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:25:01,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858292888] [2020-10-19 22:25:01,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:25:01,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:25:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:25:01,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858292888] [2020-10-19 22:25:01,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:25:01,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:25:01,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982365405] [2020-10-19 22:25:01,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:25:01,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:25:01,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:25:01,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:25:01,618 INFO L87 Difference]: Start difference. First operand 73733 states and 91139 transitions. Second operand 3 states. [2020-10-19 22:25:02,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:25:02,494 INFO L93 Difference]: Finished difference Result 121865 states and 151557 transitions. [2020-10-19 22:25:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:25:02,495 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-19 22:25:02,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:25:02,593 INFO L225 Difference]: With dead ends: 121865 [2020-10-19 22:25:02,593 INFO L226 Difference]: Without dead ends: 121863 [2020-10-19 22:25:02,607 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 [2020-10-19 22:25:02,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121863 states. [2020-10-19 22:25:05,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121863 to 113669. [2020-10-19 22:25:05,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113669 states. [2020-10-19 22:25:05,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113669 states to 113669 states and 137219 transitions. [2020-10-19 22:25:05,161 INFO L78 Accepts]: Start accepts. Automaton has 113669 states and 137219 transitions. Word has length 31 [2020-10-19 22:25:05,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:25:05,161 INFO L481 AbstractCegarLoop]: Abstraction has 113669 states and 137219 transitions. [2020-10-19 22:25:05,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:25:05,161 INFO L276 IsEmpty]: Start isEmpty. Operand 113669 states and 137219 transitions. [2020-10-19 22:25:05,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 22:25:05,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:25:05,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:25:05,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-19 22:25:05,219 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:25:05,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:25:05,219 INFO L82 PathProgramCache]: Analyzing trace with hash -510862720, now seen corresponding path program 1 times [2020-10-19 22:25:05,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:25:05,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159221245] [2020-10-19 22:25:05,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:25:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:25:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:25:05,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159221245] [2020-10-19 22:25:05,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:25:05,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:25:05,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113122337] [2020-10-19 22:25:05,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:25:05,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:25:05,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:25:05,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:25:05,245 INFO L87 Difference]: Start difference. First operand 113669 states and 137219 transitions. Second operand 3 states. [2020-10-19 22:25:07,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:25:07,851 INFO L93 Difference]: Finished difference Result 257033 states and 309253 transitions. [2020-10-19 22:25:07,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:25:07,852 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-19 22:25:07,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:25:07,965 INFO L225 Difference]: With dead ends: 257033 [2020-10-19 22:25:07,965 INFO L226 Difference]: Without dead ends: 144391 [2020-10-19 22:25:08,008 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 [2020-10-19 22:25:08,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144391 states. [2020-10-19 22:25:12,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144391 to 144389. [2020-10-19 22:25:12,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144389 states. [2020-10-19 22:25:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144389 states to 144389 states and 169987 transitions. [2020-10-19 22:25:12,681 INFO L78 Accepts]: Start accepts. Automaton has 144389 states and 169987 transitions. Word has length 31 [2020-10-19 22:25:12,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:25:12,681 INFO L481 AbstractCegarLoop]: Abstraction has 144389 states and 169987 transitions. [2020-10-19 22:25:12,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:25:12,682 INFO L276 IsEmpty]: Start isEmpty. Operand 144389 states and 169987 transitions. [2020-10-19 22:25:12,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-19 22:25:12,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:25:12,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:25:12,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-19 22:25:12,750 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:25:12,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:25:12,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1363278403, now seen corresponding path program 1 times [2020-10-19 22:25:12,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:25:12,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279726481] [2020-10-19 22:25:12,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:25:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:25:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:25:12,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279726481] [2020-10-19 22:25:12,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:25:12,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:25:12,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650871103] [2020-10-19 22:25:12,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:25:12,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:25:12,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:25:12,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:25:12,776 INFO L87 Difference]: Start difference. First operand 144389 states and 169987 transitions. Second operand 3 states. [2020-10-19 22:25:15,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:25:15,847 INFO L93 Difference]: Finished difference Result 218121 states and 257029 transitions. [2020-10-19 22:25:15,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:25:15,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-10-19 22:25:15,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:25:15,970 INFO L225 Difference]: With dead ends: 218121 [2020-10-19 22:25:15,970 INFO L226 Difference]: Without dead ends: 147463 [2020-10-19 22:25:16,008 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 [2020-10-19 22:25:16,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147463 states. [2020-10-19 22:25:19,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147463 to 147461. [2020-10-19 22:25:19,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147461 states. [2020-10-19 22:25:19,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147461 states to 147461 states and 172035 transitions. [2020-10-19 22:25:19,165 INFO L78 Accepts]: Start accepts. Automaton has 147461 states and 172035 transitions. Word has length 32 [2020-10-19 22:25:19,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:25:19,166 INFO L481 AbstractCegarLoop]: Abstraction has 147461 states and 172035 transitions. [2020-10-19 22:25:19,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:25:19,166 INFO L276 IsEmpty]: Start isEmpty. Operand 147461 states and 172035 transitions. [2020-10-19 22:25:19,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-19 22:25:19,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:25:19,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:25:19,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-19 22:25:19,218 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:25:19,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:25:19,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1343340991, now seen corresponding path program 1 times [2020-10-19 22:25:19,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:25:19,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981040624] [2020-10-19 22:25:19,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:25:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:25:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:25:19,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981040624] [2020-10-19 22:25:19,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:25:19,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:25:19,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478260166] [2020-10-19 22:25:19,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:25:19,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:25:19,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:25:19,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:25:19,242 INFO L87 Difference]: Start difference. First operand 147461 states and 172035 transitions. Second operand 3 states. [2020-10-19 22:25:23,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:25:23,279 INFO L93 Difference]: Finished difference Result 237575 states and 274436 transitions. [2020-10-19 22:25:23,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:25:23,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-10-19 22:25:23,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:25:23,470 INFO L225 Difference]: With dead ends: 237575 [2020-10-19 22:25:23,470 INFO L226 Difference]: Without dead ends: 237573 [2020-10-19 22:25:23,494 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 [2020-10-19 22:25:23,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237573 states. [2020-10-19 22:25:26,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237573 to 229381. [2020-10-19 22:25:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229381 states. [2020-10-19 22:25:26,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229381 states to 229381 states and 262147 transitions. [2020-10-19 22:25:26,712 INFO L78 Accepts]: Start accepts. Automaton has 229381 states and 262147 transitions. Word has length 32 [2020-10-19 22:25:26,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:25:26,712 INFO L481 AbstractCegarLoop]: Abstraction has 229381 states and 262147 transitions. [2020-10-19 22:25:26,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:25:26,712 INFO L276 IsEmpty]: Start isEmpty. Operand 229381 states and 262147 transitions. [2020-10-19 22:25:26,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-19 22:25:26,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:25:26,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:25:26,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-19 22:25:26,824 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:25:26,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:25:26,824 INFO L82 PathProgramCache]: Analyzing trace with hash 322272637, now seen corresponding path program 1 times [2020-10-19 22:25:26,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:25:26,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130282829] [2020-10-19 22:25:26,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:25:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:25:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:25:26,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130282829] [2020-10-19 22:25:26,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:25:26,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:25:26,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124076872] [2020-10-19 22:25:26,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:25:26,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:25:26,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:25:26,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:25:26,856 INFO L87 Difference]: Start difference. First operand 229381 states and 262147 transitions. Second operand 3 states. [2020-10-19 22:25:31,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:25:31,305 INFO L93 Difference]: Finished difference Result 512005 states and 577539 transitions. [2020-10-19 22:25:31,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:25:31,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-10-19 22:25:31,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:25:31,306 INFO L225 Difference]: With dead ends: 512005 [2020-10-19 22:25:31,307 INFO L226 Difference]: Without dead ends: 0 [2020-10-19 22:25:31,424 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 [2020-10-19 22:25:31,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-19 22:25:31,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-19 22:25:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-19 22:25:31,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 22:25:31,425 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2020-10-19 22:25:31,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:25:31,425 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 22:25:31,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:25:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-19 22:25:31,426 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-19 22:25:31,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-19 22:25:31,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-19 22:25:31,927 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-10-19 22:25:31,938 INFO L274 CegarLoopResult]: For program point L52(lines 52 54) no Hoare annotation was computed. [2020-10-19 22:25:31,938 INFO L274 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-10-19 22:25:31,938 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-19 22:25:31,938 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-19 22:25:31,938 INFO L274 CegarLoopResult]: For program point L152-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,939 INFO L274 CegarLoopResult]: For program point L119-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,939 INFO L274 CegarLoopResult]: For program point L103-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,939 INFO L274 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-10-19 22:25:31,939 INFO L274 CegarLoopResult]: For program point L87-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,939 INFO L277 CegarLoopResult]: At program point L203(lines 7 207) the Hoare annotation is: true [2020-10-19 22:25:31,939 INFO L274 CegarLoopResult]: For program point L137-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,939 INFO L274 CegarLoopResult]: For program point L187-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,940 INFO L274 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-10-19 22:25:31,940 INFO L274 CegarLoopResult]: For program point L188(line 188) no Hoare annotation was computed. [2020-10-19 22:25:31,940 INFO L274 CegarLoopResult]: For program point L172-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,940 INFO L274 CegarLoopResult]: For program point L123-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,940 INFO L277 CegarLoopResult]: At program point L206(lines 6 207) the Hoare annotation is: true [2020-10-19 22:25:31,940 INFO L274 CegarLoopResult]: For program point L173(line 173) no Hoare annotation was computed. [2020-10-19 22:25:31,940 INFO L274 CegarLoopResult]: For program point L107-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,940 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-19 22:25:31,940 INFO L274 CegarLoopResult]: For program point L157-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,940 INFO L274 CegarLoopResult]: For program point L91-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,941 INFO L274 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-10-19 22:25:31,941 INFO L274 CegarLoopResult]: For program point L142-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,942 INFO L274 CegarLoopResult]: For program point L192-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,942 INFO L274 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-10-19 22:25:31,942 INFO L274 CegarLoopResult]: For program point L193(line 193) no Hoare annotation was computed. [2020-10-19 22:25:31,942 INFO L274 CegarLoopResult]: For program point L127-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,942 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-19 22:25:31,942 INFO L274 CegarLoopResult]: For program point L177-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,942 INFO L274 CegarLoopResult]: For program point L111-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,943 INFO L274 CegarLoopResult]: For program point L95-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,943 INFO L274 CegarLoopResult]: For program point L178(line 178) no Hoare annotation was computed. [2020-10-19 22:25:31,943 INFO L274 CegarLoopResult]: For program point L162-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,943 INFO L274 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-10-19 22:25:31,943 INFO L274 CegarLoopResult]: For program point L147-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,943 INFO L277 CegarLoopResult]: At program point L197-1(lines 50 202) the Hoare annotation is: true [2020-10-19 22:25:31,943 INFO L274 CegarLoopResult]: For program point L131-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,943 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-19 22:25:31,944 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-19 22:25:31,944 INFO L274 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-10-19 22:25:31,944 INFO L274 CegarLoopResult]: For program point L115-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,944 INFO L274 CegarLoopResult]: For program point L198(line 198) no Hoare annotation was computed. [2020-10-19 22:25:31,944 INFO L270 CegarLoopResult]: At program point L198-1(lines 7 207) the Hoare annotation is: false [2020-10-19 22:25:31,944 INFO L274 CegarLoopResult]: For program point L99-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,944 INFO L274 CegarLoopResult]: For program point L182-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,944 INFO L274 CegarLoopResult]: For program point L83(lines 83 85) no Hoare annotation was computed. [2020-10-19 22:25:31,944 INFO L274 CegarLoopResult]: For program point L83-2(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,945 INFO L274 CegarLoopResult]: For program point L183(line 183) no Hoare annotation was computed. [2020-10-19 22:25:31,945 INFO L274 CegarLoopResult]: For program point L167-1(lines 50 202) no Hoare annotation was computed. [2020-10-19 22:25:31,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:25:31 BoogieIcfgContainer [2020-10-19 22:25:31,960 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:25:31,961 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:25:31,961 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:25:31,961 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:25:31,962 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:24:39" (3/4) ... [2020-10-19 22:25:31,966 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-19 22:25:32,005 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-19 22:25:32,006 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-19 22:25:32,006 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 22:25:32,007 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 22:25:32,071 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 22:25:32,071 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:25:32,073 INFO L168 Benchmark]: Toolchain (without parser) took 53652.44 ms. Allocated memory was 40.4 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 18.2 MB in the beginning and 948.9 MB in the end (delta: -930.7 MB). Peak memory consumption was 608.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:25:32,073 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 30.9 MB. Free memory was 6.2 MB in the beginning and 6.2 MB in the end (delta: 41.7 kB). Peak memory consumption was 41.7 kB. Max. memory is 14.3 GB. [2020-10-19 22:25:32,074 INFO L168 Benchmark]: CACSL2BoogieTranslator took 345.88 ms. Allocated memory was 40.4 MB in the beginning and 41.4 MB in the end (delta: 1.0 MB). Free memory was 17.3 MB in the beginning and 16.5 MB in the end (delta: 855.7 kB). Peak memory consumption was 7.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:25:32,074 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.83 ms. Allocated memory is still 41.4 MB. Free memory was 16.5 MB in the beginning and 14.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-19 22:25:32,075 INFO L168 Benchmark]: Boogie Preprocessor took 30.23 ms. Allocated memory is still 41.4 MB. Free memory was 14.4 MB in the beginning and 12.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:25:32,075 INFO L168 Benchmark]: RCFGBuilder took 509.14 ms. Allocated memory was 41.4 MB in the beginning and 43.0 MB in the end (delta: 1.6 MB). Free memory was 12.7 MB in the beginning and 20.1 MB in the end (delta: -7.4 MB). Peak memory consumption was 3.7 MB. Max. memory is 14.3 GB. [2020-10-19 22:25:32,075 INFO L168 Benchmark]: TraceAbstraction took 52601.75 ms. Allocated memory was 43.0 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 19.6 MB in the beginning and 948.9 MB in the end (delta: -929.3 MB). Peak memory consumption was 1.1 GB. Max. memory is 14.3 GB. [2020-10-19 22:25:32,076 INFO L168 Benchmark]: Witness Printer took 110.79 ms. Allocated memory is still 1.6 GB. Free memory was 948.9 MB in the beginning and 948.9 MB in the end (delta: 4.2 kB). Peak memory consumption was 4.2 kB. Max. memory is 14.3 GB. [2020-10-19 22:25:32,079 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 30.9 MB. Free memory was 6.2 MB in the beginning and 6.2 MB in the end (delta: 41.7 kB). Peak memory consumption was 41.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 345.88 ms. Allocated memory was 40.4 MB in the beginning and 41.4 MB in the end (delta: 1.0 MB). Free memory was 17.3 MB in the beginning and 16.5 MB in the end (delta: 855.7 kB). Peak memory consumption was 7.8 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 40.83 ms. Allocated memory is still 41.4 MB. Free memory was 16.5 MB in the beginning and 14.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 30.23 ms. Allocated memory is still 41.4 MB. Free memory was 14.4 MB in the beginning and 12.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * RCFGBuilder took 509.14 ms. Allocated memory was 41.4 MB in the beginning and 43.0 MB in the end (delta: 1.6 MB). Free memory was 12.7 MB in the beginning and 20.1 MB in the end (delta: -7.4 MB). Peak memory consumption was 3.7 MB. Max. memory is 14.3 GB. * TraceAbstraction took 52601.75 ms. Allocated memory was 43.0 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 19.6 MB in the beginning and 948.9 MB in the end (delta: -929.3 MB). Peak memory consumption was 1.1 GB. Max. memory is 14.3 GB. * Witness Printer took 110.79 ms. Allocated memory is still 1.6 GB. Free memory was 948.9 MB in the beginning and 948.9 MB in the end (delta: 4.2 kB). Peak memory consumption was 4.2 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 52.0s, OverallIterations: 36, TraceHistogramMax: 1, AutomataDifference: 24.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3801 SDtfs, 1926 SDslu, 2568 SDs, 0 SdLazy, 191 SolverSat, 36 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 108 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=229381occurred in iteration=35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 24.1s AutomataMinimizationTime, 36 MinimizatonAttempts, 32806 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 8201 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 940 NumberOfCodeBlocks, 940 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 904 ConstructedInterpolants, 0 QuantifiedInterpolants, 50632 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 36 InterpolantComputations, 36 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...