/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:45:45,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:45:45,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:45:45,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:45:45,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:45:45,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:45:45,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:45:45,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:45:45,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:45:45,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:45:45,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:45:45,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:45:45,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:45:45,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:45:45,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:45:45,420 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:45:45,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:45:45,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:45:45,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:45:45,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:45:45,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:45:45,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:45:45,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:45:45,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:45:45,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:45:45,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:45:45,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:45:45,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:45:45,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:45:45,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:45:45,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:45:45,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:45:45,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:45:45,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:45:45,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:45:45,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:45:45,467 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:45:45,506 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:45:45,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:45:45,510 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:45:45,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:45:45,511 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:45:45,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:45:45,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:45:45,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:45:45,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:45:45,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:45:45,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:45:45,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:45:45,517 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:45:45,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:45:45,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:45:45,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:45:45,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:45:45,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:45:45,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:45:45,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:45:45,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:45:45,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:45:45,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:45:45,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:45:45,521 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:45:45,521 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:45:45,955 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:45:45,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:45:45,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:45:45,987 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:45:45,988 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:45:45,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label08.c [2020-12-22 09:45:46,063 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75036c74c/9ee7481a71dd4eec82b717da1b61ebbf/FLAG31b1066cf [2020-12-22 09:45:47,207 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:45:47,207 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label08.c [2020-12-22 09:45:47,260 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75036c74c/9ee7481a71dd4eec82b717da1b61ebbf/FLAG31b1066cf [2020-12-22 09:45:47,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75036c74c/9ee7481a71dd4eec82b717da1b61ebbf [2020-12-22 09:45:47,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:45:47,586 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:45:47,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:45:47,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:45:47,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:45:47,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:45:47" (1/1) ... [2020-12-22 09:45:47,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29fde1d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:47, skipping insertion in model container [2020-12-22 09:45:47,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:45:47" (1/1) ... [2020-12-22 09:45:47,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:45:47,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:45:48,259 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label08.c[8688,8701] [2020-12-22 09:45:48,321 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label08.c[11952,11965] [2020-12-22 09:45:49,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:45:49,346 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:45:49,399 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label08.c[8688,8701] [2020-12-22 09:45:49,452 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label08.c[11952,11965] [2020-12-22 09:45:50,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:45:50,230 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:45:50,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:50 WrapperNode [2020-12-22 09:45:50,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:45:50,232 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:45:50,233 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:45:50,234 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:45:50,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:50" (1/1) ... [2020-12-22 09:45:50,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:50" (1/1) ... [2020-12-22 09:45:50,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:45:50,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:45:50,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:45:50,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:45:50,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:50" (1/1) ... [2020-12-22 09:45:50,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:50" (1/1) ... [2020-12-22 09:45:50,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:50" (1/1) ... [2020-12-22 09:45:50,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:50" (1/1) ... [2020-12-22 09:45:51,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:50" (1/1) ... [2020-12-22 09:45:51,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:50" (1/1) ... [2020-12-22 09:45:51,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:50" (1/1) ... [2020-12-22 09:45:51,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:45:51,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:45:51,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:45:51,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:45:51,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:50" (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 [2020-12-22 09:45:51,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:45:51,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:45:51,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:45:51,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:45:57,138 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:45:57,138 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:45:57,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:45:57 BoogieIcfgContainer [2020-12-22 09:45:57,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:45:57,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:45:57,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:45:57,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:45:57,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:45:47" (1/3) ... [2020-12-22 09:45:57,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9b7af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:45:57, skipping insertion in model container [2020-12-22 09:45:57,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:50" (2/3) ... [2020-12-22 09:45:57,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9b7af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:45:57, skipping insertion in model container [2020-12-22 09:45:57,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:45:57" (3/3) ... [2020-12-22 09:45:57,158 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label08.c [2020-12-22 09:45:57,165 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:45:57,172 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:45:57,196 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:45:57,248 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:45:57,248 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:45:57,248 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:45:57,248 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:45:57,249 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:45:57,249 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:45:57,249 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:45:57,249 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:45:57,290 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states. [2020-12-22 09:45:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:45:57,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:57,304 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] [2020-12-22 09:45:57,304 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:57,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:57,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2020-12-22 09:45:57,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:57,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54408453] [2020-12-22 09:45:57,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:57,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54408453] [2020-12-22 09:45:57,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:57,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:45:57,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446820457] [2020-12-22 09:45:57,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:45:57,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:57,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:45:57,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:45:57,678 INFO L87 Difference]: Start difference. First operand 893 states. Second operand 2 states. [2020-12-22 09:45:57,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:57,790 INFO L93 Difference]: Finished difference Result 1757 states and 3332 transitions. [2020-12-22 09:45:57,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:45:57,792 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:45:57,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:57,831 INFO L225 Difference]: With dead ends: 1757 [2020-12-22 09:45:57,831 INFO L226 Difference]: Without dead ends: 827 [2020-12-22 09:45:57,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:45:57,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2020-12-22 09:45:57,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2020-12-22 09:45:57,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-12-22 09:45:57,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1560 transitions. [2020-12-22 09:45:57,983 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1560 transitions. Word has length 30 [2020-12-22 09:45:57,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:57,983 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1560 transitions. [2020-12-22 09:45:57,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:45:57,984 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1560 transitions. [2020-12-22 09:45:57,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:45:57,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:57,985 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] [2020-12-22 09:45:57,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:45:57,986 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:57,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:57,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2020-12-22 09:45:57,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:57,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318378918] [2020-12-22 09:45:57,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:58,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318378918] [2020-12-22 09:45:58,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:58,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:58,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356607271] [2020-12-22 09:45:58,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:45:58,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:58,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:45:58,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:45:58,102 INFO L87 Difference]: Start difference. First operand 827 states and 1560 transitions. Second operand 5 states. [2020-12-22 09:45:58,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:58,247 INFO L93 Difference]: Finished difference Result 919 states and 1702 transitions. [2020-12-22 09:45:58,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:58,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:45:58,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:58,254 INFO L225 Difference]: With dead ends: 919 [2020-12-22 09:45:58,254 INFO L226 Difference]: Without dead ends: 871 [2020-12-22 09:45:58,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:45:58,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2020-12-22 09:45:58,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 827. [2020-12-22 09:45:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-12-22 09:45:58,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1537 transitions. [2020-12-22 09:45:58,282 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1537 transitions. Word has length 30 [2020-12-22 09:45:58,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:58,282 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1537 transitions. [2020-12-22 09:45:58,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:45:58,283 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1537 transitions. [2020-12-22 09:45:58,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:45:58,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:58,289 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] [2020-12-22 09:45:58,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:45:58,290 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:58,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:58,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1429161427, now seen corresponding path program 1 times [2020-12-22 09:45:58,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:58,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968748081] [2020-12-22 09:45:58,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:58,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968748081] [2020-12-22 09:45:58,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:58,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:45:58,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154413160] [2020-12-22 09:45:58,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:58,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:58,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:58,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:58,416 INFO L87 Difference]: Start difference. First operand 827 states and 1537 transitions. Second operand 3 states. [2020-12-22 09:46:04,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:04,528 INFO L93 Difference]: Finished difference Result 2331 states and 4410 transitions. [2020-12-22 09:46:04,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:04,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-22 09:46:04,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:04,552 INFO L225 Difference]: With dead ends: 2331 [2020-12-22 09:46:04,553 INFO L226 Difference]: Without dead ends: 1578 [2020-12-22 09:46:04,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:04,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2020-12-22 09:46:04,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1578. [2020-12-22 09:46:04,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-12-22 09:46:04,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2906 transitions. [2020-12-22 09:46:04,624 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2906 transitions. Word has length 30 [2020-12-22 09:46:04,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:04,625 INFO L481 AbstractCegarLoop]: Abstraction has 1578 states and 2906 transitions. [2020-12-22 09:46:04,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:04,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2906 transitions. [2020-12-22 09:46:04,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:46:04,627 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:04,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:04,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:46:04,628 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:04,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:04,629 INFO L82 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2020-12-22 09:46:04,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:04,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676563961] [2020-12-22 09:46:04,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:04,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:04,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676563961] [2020-12-22 09:46:04,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:04,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:04,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000620674] [2020-12-22 09:46:04,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:04,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:04,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:04,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:04,754 INFO L87 Difference]: Start difference. First operand 1578 states and 2906 transitions. Second operand 3 states. [2020-12-22 09:46:04,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:04,804 INFO L93 Difference]: Finished difference Result 1660 states and 3034 transitions. [2020-12-22 09:46:04,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:04,805 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:46:04,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:04,816 INFO L225 Difference]: With dead ends: 1660 [2020-12-22 09:46:04,816 INFO L226 Difference]: Without dead ends: 1616 [2020-12-22 09:46:04,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:04,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2020-12-22 09:46:04,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1614. [2020-12-22 09:46:04,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1614 states. [2020-12-22 09:46:04,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2963 transitions. [2020-12-22 09:46:04,865 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2963 transitions. Word has length 52 [2020-12-22 09:46:04,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:04,865 INFO L481 AbstractCegarLoop]: Abstraction has 1614 states and 2963 transitions. [2020-12-22 09:46:04,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:04,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2963 transitions. [2020-12-22 09:46:04,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:46:04,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:04,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:04,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:46:04,868 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:04,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:04,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2020-12-22 09:46:04,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:04,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875837425] [2020-12-22 09:46:04,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:04,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875837425] [2020-12-22 09:46:04,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:04,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:04,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437892626] [2020-12-22 09:46:04,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:04,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:04,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:04,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:04,944 INFO L87 Difference]: Start difference. First operand 1614 states and 2963 transitions. Second operand 3 states. [2020-12-22 09:46:05,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:05,004 INFO L93 Difference]: Finished difference Result 1762 states and 3195 transitions. [2020-12-22 09:46:05,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:05,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:46:05,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:05,016 INFO L225 Difference]: With dead ends: 1762 [2020-12-22 09:46:05,016 INFO L226 Difference]: Without dead ends: 1682 [2020-12-22 09:46:05,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:05,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2020-12-22 09:46:05,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1680. [2020-12-22 09:46:05,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1680 states. [2020-12-22 09:46:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 3066 transitions. [2020-12-22 09:46:05,071 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 3066 transitions. Word has length 52 [2020-12-22 09:46:05,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:05,071 INFO L481 AbstractCegarLoop]: Abstraction has 1680 states and 3066 transitions. [2020-12-22 09:46:05,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:05,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 3066 transitions. [2020-12-22 09:46:05,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:46:05,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:05,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:05,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:46:05,073 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:05,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:05,074 INFO L82 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2020-12-22 09:46:05,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:05,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931077458] [2020-12-22 09:46:05,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:05,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931077458] [2020-12-22 09:46:05,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:05,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:05,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812492308] [2020-12-22 09:46:05,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:05,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:05,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:05,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:05,160 INFO L87 Difference]: Start difference. First operand 1680 states and 3066 transitions. Second operand 3 states. [2020-12-22 09:46:05,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:05,217 INFO L93 Difference]: Finished difference Result 1948 states and 3484 transitions. [2020-12-22 09:46:05,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:05,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:46:05,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:05,231 INFO L225 Difference]: With dead ends: 1948 [2020-12-22 09:46:05,232 INFO L226 Difference]: Without dead ends: 1802 [2020-12-22 09:46:05,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:05,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2020-12-22 09:46:05,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1800. [2020-12-22 09:46:05,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1800 states. [2020-12-22 09:46:05,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 3250 transitions. [2020-12-22 09:46:05,299 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 3250 transitions. Word has length 52 [2020-12-22 09:46:05,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:05,300 INFO L481 AbstractCegarLoop]: Abstraction has 1800 states and 3250 transitions. [2020-12-22 09:46:05,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:05,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 3250 transitions. [2020-12-22 09:46:05,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:46:05,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:05,301 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:05,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:46:05,302 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:05,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:05,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2020-12-22 09:46:05,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:05,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132242894] [2020-12-22 09:46:05,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:05,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132242894] [2020-12-22 09:46:05,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:05,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:05,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834541524] [2020-12-22 09:46:05,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:05,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:05,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:05,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:05,364 INFO L87 Difference]: Start difference. First operand 1800 states and 3250 transitions. Second operand 3 states. [2020-12-22 09:46:05,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:05,424 INFO L93 Difference]: Finished difference Result 2284 states and 3996 transitions. [2020-12-22 09:46:05,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:05,425 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:46:05,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:05,438 INFO L225 Difference]: With dead ends: 2284 [2020-12-22 09:46:05,439 INFO L226 Difference]: Without dead ends: 2018 [2020-12-22 09:46:05,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:05,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2020-12-22 09:46:05,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 2016. [2020-12-22 09:46:05,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2016 states. [2020-12-22 09:46:05,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3574 transitions. [2020-12-22 09:46:05,570 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3574 transitions. Word has length 52 [2020-12-22 09:46:05,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:05,570 INFO L481 AbstractCegarLoop]: Abstraction has 2016 states and 3574 transitions. [2020-12-22 09:46:05,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:05,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3574 transitions. [2020-12-22 09:46:05,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:46:05,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:05,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:05,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:46:05,572 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:05,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:05,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2020-12-22 09:46:05,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:05,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120572457] [2020-12-22 09:46:05,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:05,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120572457] [2020-12-22 09:46:05,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:05,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:46:05,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806162746] [2020-12-22 09:46:05,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:05,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:05,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:05,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:05,694 INFO L87 Difference]: Start difference. First operand 2016 states and 3574 transitions. Second operand 6 states. [2020-12-22 09:46:06,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:06,028 INFO L93 Difference]: Finished difference Result 5872 states and 9470 transitions. [2020-12-22 09:46:06,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:46:06,029 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:46:06,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:06,062 INFO L225 Difference]: With dead ends: 5872 [2020-12-22 09:46:06,062 INFO L226 Difference]: Without dead ends: 5390 [2020-12-22 09:46:06,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:46:06,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2020-12-22 09:46:06,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 2496. [2020-12-22 09:46:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2496 states. [2020-12-22 09:46:06,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 4278 transitions. [2020-12-22 09:46:06,217 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 4278 transitions. Word has length 52 [2020-12-22 09:46:06,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:06,217 INFO L481 AbstractCegarLoop]: Abstraction has 2496 states and 4278 transitions. [2020-12-22 09:46:06,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:06,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 4278 transitions. [2020-12-22 09:46:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:46:06,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:06,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:06,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:46:06,219 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:06,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2020-12-22 09:46:06,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:06,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728232777] [2020-12-22 09:46:06,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:06,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728232777] [2020-12-22 09:46:06,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:06,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:06,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449082560] [2020-12-22 09:46:06,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:06,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:06,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:06,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:06,324 INFO L87 Difference]: Start difference. First operand 2496 states and 4278 transitions. Second operand 3 states. [2020-12-22 09:46:06,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:06,435 INFO L93 Difference]: Finished difference Result 3902 states and 6378 transitions. [2020-12-22 09:46:06,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:06,435 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:46:06,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:06,453 INFO L225 Difference]: With dead ends: 3902 [2020-12-22 09:46:06,453 INFO L226 Difference]: Without dead ends: 2940 [2020-12-22 09:46:06,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:06,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2020-12-22 09:46:06,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2020-12-22 09:46:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:46:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4912 transitions. [2020-12-22 09:46:06,593 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4912 transitions. Word has length 54 [2020-12-22 09:46:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:06,595 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4912 transitions. [2020-12-22 09:46:06,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:06,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4912 transitions. [2020-12-22 09:46:06,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:46:06,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:06,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:06,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:46:06,596 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:06,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:06,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2020-12-22 09:46:06,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:06,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598218762] [2020-12-22 09:46:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:06,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598218762] [2020-12-22 09:46:06,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:06,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:46:06,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064239334] [2020-12-22 09:46:06,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:06,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:06,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:06,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:06,786 INFO L87 Difference]: Start difference. First operand 2938 states and 4912 transitions. Second operand 6 states. [2020-12-22 09:46:07,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:07,057 INFO L93 Difference]: Finished difference Result 4342 states and 6986 transitions. [2020-12-22 09:46:07,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:07,058 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:46:07,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:07,077 INFO L225 Difference]: With dead ends: 4342 [2020-12-22 09:46:07,077 INFO L226 Difference]: Without dead ends: 2940 [2020-12-22 09:46:07,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:46:07,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2020-12-22 09:46:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2020-12-22 09:46:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:46:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4888 transitions. [2020-12-22 09:46:07,212 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4888 transitions. Word has length 54 [2020-12-22 09:46:07,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:07,213 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4888 transitions. [2020-12-22 09:46:07,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:07,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4888 transitions. [2020-12-22 09:46:07,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:46:07,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:07,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:07,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:46:07,214 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:07,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:07,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2020-12-22 09:46:07,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:07,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370763909] [2020-12-22 09:46:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:07,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370763909] [2020-12-22 09:46:07,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:07,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:46:07,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856495108] [2020-12-22 09:46:07,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:07,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:07,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:07,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:07,318 INFO L87 Difference]: Start difference. First operand 2938 states and 4888 transitions. Second operand 6 states. [2020-12-22 09:46:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:07,548 INFO L93 Difference]: Finished difference Result 4340 states and 6937 transitions. [2020-12-22 09:46:07,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:07,549 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:46:07,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:07,565 INFO L225 Difference]: With dead ends: 4340 [2020-12-22 09:46:07,566 INFO L226 Difference]: Without dead ends: 2938 [2020-12-22 09:46:07,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:46:07,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2020-12-22 09:46:07,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2020-12-22 09:46:07,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:46:07,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4864 transitions. [2020-12-22 09:46:07,711 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4864 transitions. Word has length 55 [2020-12-22 09:46:07,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:07,711 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4864 transitions. [2020-12-22 09:46:07,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:07,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4864 transitions. [2020-12-22 09:46:07,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:46:07,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:07,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:07,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:46:07,712 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:07,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:07,713 INFO L82 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2020-12-22 09:46:07,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:07,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097989572] [2020-12-22 09:46:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:07,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097989572] [2020-12-22 09:46:07,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:07,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:46:07,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252958739] [2020-12-22 09:46:07,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:07,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:07,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:07,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:07,788 INFO L87 Difference]: Start difference. First operand 2938 states and 4864 transitions. Second operand 6 states. [2020-12-22 09:46:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:08,022 INFO L93 Difference]: Finished difference Result 4340 states and 6889 transitions. [2020-12-22 09:46:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:08,023 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:46:08,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:08,032 INFO L225 Difference]: With dead ends: 4340 [2020-12-22 09:46:08,032 INFO L226 Difference]: Without dead ends: 2938 [2020-12-22 09:46:08,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:46:08,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2020-12-22 09:46:08,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2020-12-22 09:46:08,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:46:08,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4840 transitions. [2020-12-22 09:46:08,244 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4840 transitions. Word has length 55 [2020-12-22 09:46:08,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:08,245 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4840 transitions. [2020-12-22 09:46:08,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:08,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4840 transitions. [2020-12-22 09:46:08,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:46:08,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:08,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:08,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:46:08,247 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:08,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:08,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2020-12-22 09:46:08,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:08,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694681370] [2020-12-22 09:46:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:08,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694681370] [2020-12-22 09:46:08,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:08,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:46:08,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275218658] [2020-12-22 09:46:08,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:46:08,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:08,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:46:08,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:46:08,330 INFO L87 Difference]: Start difference. First operand 2938 states and 4840 transitions. Second operand 5 states. [2020-12-22 09:46:08,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:08,617 INFO L93 Difference]: Finished difference Result 4169 states and 6538 transitions. [2020-12-22 09:46:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:46:08,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:46:08,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:08,629 INFO L225 Difference]: With dead ends: 4169 [2020-12-22 09:46:08,629 INFO L226 Difference]: Without dead ends: 4167 [2020-12-22 09:46:08,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:46:08,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2020-12-22 09:46:08,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 3034. [2020-12-22 09:46:08,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3034 states. [2020-12-22 09:46:08,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4928 transitions. [2020-12-22 09:46:08,869 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4928 transitions. Word has length 55 [2020-12-22 09:46:08,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:08,870 INFO L481 AbstractCegarLoop]: Abstraction has 3034 states and 4928 transitions. [2020-12-22 09:46:08,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:46:08,870 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4928 transitions. [2020-12-22 09:46:08,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:46:08,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:08,873 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:08,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:46:08,873 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:08,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:08,874 INFO L82 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2020-12-22 09:46:08,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:08,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989356133] [2020-12-22 09:46:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:46:09,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989356133] [2020-12-22 09:46:09,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:09,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:46:09,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369096497] [2020-12-22 09:46:09,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:09,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:09,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:09,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:09,014 INFO L87 Difference]: Start difference. First operand 3034 states and 4928 transitions. Second operand 6 states. [2020-12-22 09:46:09,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:09,664 INFO L93 Difference]: Finished difference Result 9340 states and 13697 transitions. [2020-12-22 09:46:09,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:09,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:46:09,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:09,683 INFO L225 Difference]: With dead ends: 9340 [2020-12-22 09:46:09,684 INFO L226 Difference]: Without dead ends: 7842 [2020-12-22 09:46:09,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:46:09,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2020-12-22 09:46:10,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 4530. [2020-12-22 09:46:10,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4530 states. [2020-12-22 09:46:10,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 6992 transitions. [2020-12-22 09:46:10,124 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 6992 transitions. Word has length 79 [2020-12-22 09:46:10,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:10,125 INFO L481 AbstractCegarLoop]: Abstraction has 4530 states and 6992 transitions. [2020-12-22 09:46:10,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:10,125 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 6992 transitions. [2020-12-22 09:46:10,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:46:10,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:10,128 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:10,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:46:10,129 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:10,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:10,130 INFO L82 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2020-12-22 09:46:10,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:10,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502869899] [2020-12-22 09:46:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:10,247 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:46:10,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502869899] [2020-12-22 09:46:10,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:10,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:46:10,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273173323] [2020-12-22 09:46:10,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:10,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:10,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:10,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:10,250 INFO L87 Difference]: Start difference. First operand 4530 states and 6992 transitions. Second operand 6 states. [2020-12-22 09:46:11,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:11,015 INFO L93 Difference]: Finished difference Result 10836 states and 15761 transitions. [2020-12-22 09:46:11,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:11,015 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:46:11,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:11,041 INFO L225 Difference]: With dead ends: 10836 [2020-12-22 09:46:11,042 INFO L226 Difference]: Without dead ends: 9338 [2020-12-22 09:46:11,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:46:11,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2020-12-22 09:46:11,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 6778. [2020-12-22 09:46:11,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6778 states. [2020-12-22 09:46:11,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 10068 transitions. [2020-12-22 09:46:11,574 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 10068 transitions. Word has length 79 [2020-12-22 09:46:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:11,575 INFO L481 AbstractCegarLoop]: Abstraction has 6778 states and 10068 transitions. [2020-12-22 09:46:11,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 10068 transitions. [2020-12-22 09:46:11,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:46:11,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:11,578 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:11,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:46:11,578 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:11,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:11,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2020-12-22 09:46:11,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:11,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506475386] [2020-12-22 09:46:11,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:46:11,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506475386] [2020-12-22 09:46:11,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:11,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:46:11,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658421258] [2020-12-22 09:46:11,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:11,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:11,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:11,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:11,761 INFO L87 Difference]: Start difference. First operand 6778 states and 10068 transitions. Second operand 6 states. [2020-12-22 09:46:12,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:12,766 INFO L93 Difference]: Finished difference Result 12332 states and 17825 transitions. [2020-12-22 09:46:12,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:12,767 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:46:12,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:12,794 INFO L225 Difference]: With dead ends: 12332 [2020-12-22 09:46:12,795 INFO L226 Difference]: Without dead ends: 10834 [2020-12-22 09:46:12,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:46:12,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2020-12-22 09:46:13,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8274. [2020-12-22 09:46:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8274 states. [2020-12-22 09:46:13,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 12132 transitions. [2020-12-22 09:46:13,468 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 12132 transitions. Word has length 79 [2020-12-22 09:46:13,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:13,468 INFO L481 AbstractCegarLoop]: Abstraction has 8274 states and 12132 transitions. [2020-12-22 09:46:13,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:13,468 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 12132 transitions. [2020-12-22 09:46:13,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:46:13,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:13,472 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:13,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:46:13,472 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:13,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:13,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2020-12-22 09:46:13,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:13,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473286769] [2020-12-22 09:46:13,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:46:13,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473286769] [2020-12-22 09:46:13,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:13,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:46:13,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916438687] [2020-12-22 09:46:13,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:13,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:13,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:13,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:13,572 INFO L87 Difference]: Start difference. First operand 8274 states and 12132 transitions. Second operand 6 states. [2020-12-22 09:46:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:14,528 INFO L93 Difference]: Finished difference Result 12948 states and 18689 transitions. [2020-12-22 09:46:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:14,529 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:46:14,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:14,556 INFO L225 Difference]: With dead ends: 12948 [2020-12-22 09:46:14,556 INFO L226 Difference]: Without dead ends: 11890 [2020-12-22 09:46:14,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:46:14,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11890 states. [2020-12-22 09:46:15,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11890 to 9330. [2020-12-22 09:46:15,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9330 states. [2020-12-22 09:46:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9330 states to 9330 states and 13604 transitions. [2020-12-22 09:46:15,326 INFO L78 Accepts]: Start accepts. Automaton has 9330 states and 13604 transitions. Word has length 79 [2020-12-22 09:46:15,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:15,327 INFO L481 AbstractCegarLoop]: Abstraction has 9330 states and 13604 transitions. [2020-12-22 09:46:15,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:15,327 INFO L276 IsEmpty]: Start isEmpty. Operand 9330 states and 13604 transitions. [2020-12-22 09:46:15,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:46:15,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:15,331 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:15,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:46:15,332 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:15,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:15,332 INFO L82 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2020-12-22 09:46:15,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:15,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318392925] [2020-12-22 09:46:15,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:15,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318392925] [2020-12-22 09:46:15,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658857245] [2020-12-22 09:46:15,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:15,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:46:15,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:46:16,154 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:46:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:16,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:46:16,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 09:46:16,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455918906] [2020-12-22 09:46:16,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:46:16,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:16,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:46:16,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:46:16,529 INFO L87 Difference]: Start difference. First operand 9330 states and 13604 transitions. Second operand 18 states. [2020-12-22 09:46:16,660 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:19,877 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:20,483 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:21,156 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:46:23,459 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:25,771 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:26,392 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:26,572 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:26,710 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:46:27,431 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 09:46:27,841 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:46:28,543 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:46:29,964 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:30,581 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:30,711 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:31,025 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:34,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:34,892 INFO L93 Difference]: Finished difference Result 85950 states and 117699 transitions. [2020-12-22 09:46:34,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:46:34,892 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-12-22 09:46:34,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:35,079 INFO L225 Difference]: With dead ends: 85950 [2020-12-22 09:46:35,079 INFO L226 Difference]: Without dead ends: 78156 [2020-12-22 09:46:35,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6416 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 09:46:35,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78156 states. [2020-12-22 09:46:39,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78156 to 35946. [2020-12-22 09:46:39,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35946 states. [2020-12-22 09:46:39,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35946 states to 35946 states and 50122 transitions. [2020-12-22 09:46:39,612 INFO L78 Accepts]: Start accepts. Automaton has 35946 states and 50122 transitions. Word has length 80 [2020-12-22 09:46:39,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:39,612 INFO L481 AbstractCegarLoop]: Abstraction has 35946 states and 50122 transitions. [2020-12-22 09:46:39,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:46:39,613 INFO L276 IsEmpty]: Start isEmpty. Operand 35946 states and 50122 transitions. [2020-12-22 09:46:39,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:39,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:39,620 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:39,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:46:39,835 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:39,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:39,836 INFO L82 PathProgramCache]: Analyzing trace with hash -808690280, now seen corresponding path program 1 times [2020-12-22 09:46:39,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:39,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342270731] [2020-12-22 09:46:39,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:39,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342270731] [2020-12-22 09:46:39,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:39,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:39,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183065053] [2020-12-22 09:46:39,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:39,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:39,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:39,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:39,916 INFO L87 Difference]: Start difference. First operand 35946 states and 50122 transitions. Second operand 3 states. [2020-12-22 09:46:42,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:42,793 INFO L93 Difference]: Finished difference Result 70358 states and 97406 transitions. [2020-12-22 09:46:42,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:42,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:46:42,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:42,872 INFO L225 Difference]: With dead ends: 70358 [2020-12-22 09:46:42,872 INFO L226 Difference]: Without dead ends: 35948 [2020-12-22 09:46:42,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:42,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35948 states. [2020-12-22 09:46:46,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35948 to 34986. [2020-12-22 09:46:46,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34986 states. [2020-12-22 09:46:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34986 states to 34986 states and 48082 transitions. [2020-12-22 09:46:46,132 INFO L78 Accepts]: Start accepts. Automaton has 34986 states and 48082 transitions. Word has length 81 [2020-12-22 09:46:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:46,132 INFO L481 AbstractCegarLoop]: Abstraction has 34986 states and 48082 transitions. [2020-12-22 09:46:46,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:46,132 INFO L276 IsEmpty]: Start isEmpty. Operand 34986 states and 48082 transitions. [2020-12-22 09:46:46,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:46,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:46,137 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:46,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:46:46,137 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:46,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:46,138 INFO L82 PathProgramCache]: Analyzing trace with hash 188383332, now seen corresponding path program 1 times [2020-12-22 09:46:46,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:46,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898155907] [2020-12-22 09:46:46,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:46,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898155907] [2020-12-22 09:46:46,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510784227] [2020-12-22 09:46:46,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:46,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:46:46,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:46:46,708 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:46:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:47,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:46:47,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2020-12-22 09:46:47,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980714769] [2020-12-22 09:46:47,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 09:46:47,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:47,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 09:46:47,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-12-22 09:46:47,071 INFO L87 Difference]: Start difference. First operand 34986 states and 48082 transitions. Second operand 19 states. [2020-12-22 09:46:47,252 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:46:47,535 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:46:47,683 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 09:46:47,848 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:46:48,385 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:49,602 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:49,847 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:50,091 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:50,705 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:54,667 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:54,802 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:55,212 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:46:55,902 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:56,199 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 09:46:56,554 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:57,022 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:57,559 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:57,955 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:58,147 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:46:58,580 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:47:00,668 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:47:01,041 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:47:06,527 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:47:06,976 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:47:07,148 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:47:07,890 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:47:08,175 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 09:47:09,012 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:47:09,198 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:47:17,989 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:47:18,813 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:47:22,560 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:47:23,016 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:47:28,076 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:47:33,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:33,049 INFO L93 Difference]: Finished difference Result 372069 states and 495352 transitions. [2020-12-22 09:47:33,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-12-22 09:47:33,050 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-12-22 09:47:33,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:34,326 INFO L225 Difference]: With dead ends: 372069 [2020-12-22 09:47:34,326 INFO L226 Difference]: Without dead ends: 338619 [2020-12-22 09:47:34,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6674 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=2822, Invalid=15538, Unknown=0, NotChecked=0, Total=18360 [2020-12-22 09:47:34,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338619 states. [2020-12-22 09:47:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338619 to 166484. [2020-12-22 09:47:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166484 states. [2020-12-22 09:47:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166484 states to 166484 states and 224202 transitions. [2020-12-22 09:47:52,919 INFO L78 Accepts]: Start accepts. Automaton has 166484 states and 224202 transitions. Word has length 81 [2020-12-22 09:47:52,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:52,920 INFO L481 AbstractCegarLoop]: Abstraction has 166484 states and 224202 transitions. [2020-12-22 09:47:52,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 09:47:52,920 INFO L276 IsEmpty]: Start isEmpty. Operand 166484 states and 224202 transitions. [2020-12-22 09:47:52,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:52,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:52,928 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:53,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:47:53,143 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:53,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:53,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1744161872, now seen corresponding path program 1 times [2020-12-22 09:47:53,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:53,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035490928] [2020-12-22 09:47:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:53,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:53,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035490928] [2020-12-22 09:47:53,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:53,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:53,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108484245] [2020-12-22 09:47:53,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:53,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:53,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:53,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:53,545 INFO L87 Difference]: Start difference. First operand 166484 states and 224202 transitions. Second operand 3 states. [2020-12-22 09:48:02,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:02,724 INFO L93 Difference]: Finished difference Result 258048 states and 346718 transitions. [2020-12-22 09:48:02,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:02,725 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:48:02,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:03,039 INFO L225 Difference]: With dead ends: 258048 [2020-12-22 09:48:03,040 INFO L226 Difference]: Without dead ends: 93100 [2020-12-22 09:48:03,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:03,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93100 states. [2020-12-22 09:48:12,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93100 to 93098. [2020-12-22 09:48:12,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93098 states. [2020-12-22 09:48:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93098 states to 93098 states and 123658 transitions. [2020-12-22 09:48:12,394 INFO L78 Accepts]: Start accepts. Automaton has 93098 states and 123658 transitions. Word has length 81 [2020-12-22 09:48:12,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:12,395 INFO L481 AbstractCegarLoop]: Abstraction has 93098 states and 123658 transitions. [2020-12-22 09:48:12,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:12,395 INFO L276 IsEmpty]: Start isEmpty. Operand 93098 states and 123658 transitions. [2020-12-22 09:48:12,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:12,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:12,400 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:12,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:48:12,400 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:12,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:12,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1394309904, now seen corresponding path program 1 times [2020-12-22 09:48:12,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:12,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97473651] [2020-12-22 09:48:12,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:12,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97473651] [2020-12-22 09:48:12,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:12,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:12,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811324544] [2020-12-22 09:48:12,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:12,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:12,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:12,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:12,453 INFO L87 Difference]: Start difference. First operand 93098 states and 123658 transitions. Second operand 3 states. [2020-12-22 09:48:16,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:16,604 INFO L93 Difference]: Finished difference Result 135079 states and 179526 transitions. [2020-12-22 09:48:16,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:16,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:48:16,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:16,654 INFO L225 Difference]: With dead ends: 135079 [2020-12-22 09:48:16,654 INFO L226 Difference]: Without dead ends: 43517 [2020-12-22 09:48:16,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:16,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43517 states. [2020-12-22 09:48:20,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43517 to 43491. [2020-12-22 09:48:20,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43491 states. [2020-12-22 09:48:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43491 states to 43491 states and 57886 transitions. [2020-12-22 09:48:20,764 INFO L78 Accepts]: Start accepts. Automaton has 43491 states and 57886 transitions. Word has length 81 [2020-12-22 09:48:20,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:20,765 INFO L481 AbstractCegarLoop]: Abstraction has 43491 states and 57886 transitions. [2020-12-22 09:48:20,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:20,765 INFO L276 IsEmpty]: Start isEmpty. Operand 43491 states and 57886 transitions. [2020-12-22 09:48:20,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:20,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:20,769 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:20,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:48:20,769 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:20,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:20,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1995112228, now seen corresponding path program 1 times [2020-12-22 09:48:20,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:20,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476195065] [2020-12-22 09:48:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:48:20,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476195065] [2020-12-22 09:48:20,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:20,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:48:20,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684997570] [2020-12-22 09:48:20,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:20,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:20,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:20,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:20,855 INFO L87 Difference]: Start difference. First operand 43491 states and 57886 transitions. Second operand 6 states. [2020-12-22 09:48:23,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:23,428 INFO L93 Difference]: Finished difference Result 66813 states and 88456 transitions. [2020-12-22 09:48:23,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:23,433 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:48:23,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:23,475 INFO L225 Difference]: With dead ends: 66813 [2020-12-22 09:48:23,475 INFO L226 Difference]: Without dead ends: 24895 [2020-12-22 09:48:23,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:48:23,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24895 states. [2020-12-22 09:48:26,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24895 to 24895. [2020-12-22 09:48:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24895 states. [2020-12-22 09:48:26,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24895 states to 24895 states and 33051 transitions. [2020-12-22 09:48:26,042 INFO L78 Accepts]: Start accepts. Automaton has 24895 states and 33051 transitions. Word has length 81 [2020-12-22 09:48:26,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:26,042 INFO L481 AbstractCegarLoop]: Abstraction has 24895 states and 33051 transitions. [2020-12-22 09:48:26,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:26,043 INFO L276 IsEmpty]: Start isEmpty. Operand 24895 states and 33051 transitions. [2020-12-22 09:48:26,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:26,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:26,045 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:26,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:48:26,046 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:26,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:26,046 INFO L82 PathProgramCache]: Analyzing trace with hash 259210172, now seen corresponding path program 1 times [2020-12-22 09:48:26,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:26,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742634218] [2020-12-22 09:48:26,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:26,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 09:48:26,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742634218] [2020-12-22 09:48:26,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:26,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:48:26,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27422079] [2020-12-22 09:48:26,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:26,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:26,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:26,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:26,134 INFO L87 Difference]: Start difference. First operand 24895 states and 33051 transitions. Second operand 6 states. [2020-12-22 09:48:28,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:28,244 INFO L93 Difference]: Finished difference Result 43465 states and 57186 transitions. [2020-12-22 09:48:28,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:28,245 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:48:28,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:28,270 INFO L225 Difference]: With dead ends: 43465 [2020-12-22 09:48:28,271 INFO L226 Difference]: Without dead ends: 20125 [2020-12-22 09:48:28,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:48:28,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20125 states. [2020-12-22 09:48:30,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20125 to 20125. [2020-12-22 09:48:30,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20125 states. [2020-12-22 09:48:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20125 states to 20125 states and 26729 transitions. [2020-12-22 09:48:30,325 INFO L78 Accepts]: Start accepts. Automaton has 20125 states and 26729 transitions. Word has length 81 [2020-12-22 09:48:30,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:30,326 INFO L481 AbstractCegarLoop]: Abstraction has 20125 states and 26729 transitions. [2020-12-22 09:48:30,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:30,326 INFO L276 IsEmpty]: Start isEmpty. Operand 20125 states and 26729 transitions. [2020-12-22 09:48:30,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:48:30,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:30,329 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:30,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:48:30,329 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:30,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:30,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1802178222, now seen corresponding path program 1 times [2020-12-22 09:48:30,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:30,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894116891] [2020-12-22 09:48:30,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:30,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894116891] [2020-12-22 09:48:30,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:30,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:30,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128836867] [2020-12-22 09:48:30,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:30,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:30,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:30,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:30,385 INFO L87 Difference]: Start difference. First operand 20125 states and 26729 transitions. Second operand 3 states. [2020-12-22 09:48:31,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:31,472 INFO L93 Difference]: Finished difference Result 29501 states and 38699 transitions. [2020-12-22 09:48:31,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:31,473 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 09:48:31,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:31,485 INFO L225 Difference]: With dead ends: 29501 [2020-12-22 09:48:31,485 INFO L226 Difference]: Without dead ends: 10931 [2020-12-22 09:48:31,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10931 states. [2020-12-22 09:48:32,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10931 to 10929. [2020-12-22 09:48:32,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10929 states. [2020-12-22 09:48:32,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10929 states to 10929 states and 14651 transitions. [2020-12-22 09:48:32,546 INFO L78 Accepts]: Start accepts. Automaton has 10929 states and 14651 transitions. Word has length 82 [2020-12-22 09:48:32,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:32,546 INFO L481 AbstractCegarLoop]: Abstraction has 10929 states and 14651 transitions. [2020-12-22 09:48:32,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:32,546 INFO L276 IsEmpty]: Start isEmpty. Operand 10929 states and 14651 transitions. [2020-12-22 09:48:32,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:48:32,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:32,548 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:32,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:48:32,548 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:32,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:32,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1782997605, now seen corresponding path program 1 times [2020-12-22 09:48:32,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:32,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110350020] [2020-12-22 09:48:32,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:33,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110350020] [2020-12-22 09:48:33,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311422117] [2020-12-22 09:48:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:33,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 09:48:33,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:34,679 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-12-22 09:48:34,859 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:48:35,398 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-22 09:48:35,651 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-22 09:48:36,024 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 09:48:36,284 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:48:36,613 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:48:36,635 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 09:48:37,062 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-12-22 09:48:37,350 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-12-22 09:48:37,384 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:48:37,390 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:37,407 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:37,413 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:37,414 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 09:48:37,415 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:37,420 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 09:48:37,423 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:38,422 WARN L197 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 63 [2020-12-22 09:48:38,920 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:48:39,361 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-12-22 09:48:39,385 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:39,666 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:48:43,224 WARN L197 SmtUtils]: Spent 2.91 s on a formula simplification. DAG size of input: 4197 DAG size of output: 3666 [2020-12-22 09:48:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:43,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:43,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 27] total 39 [2020-12-22 09:48:43,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83317328] [2020-12-22 09:48:43,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:48:43,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:43,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:48:43,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:48:43,773 INFO L87 Difference]: Start difference. First operand 10929 states and 14651 transitions. Second operand 39 states. [2020-12-22 09:48:45,236 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2020-12-22 09:48:45,498 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2020-12-22 09:48:45,734 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-12-22 09:48:46,014 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2020-12-22 09:48:46,413 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-12-22 09:48:47,005 WARN L197 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 63 [2020-12-22 09:48:47,438 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-12-22 09:48:47,888 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 60 [2020-12-22 09:48:48,347 WARN L197 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 62 [2020-12-22 09:48:48,902 WARN L197 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 63 [2020-12-22 09:48:49,495 WARN L197 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 68 [2020-12-22 09:48:50,073 WARN L197 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 66 [2020-12-22 09:48:50,698 WARN L197 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 72 [2020-12-22 09:48:51,310 WARN L197 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 74 [2020-12-22 09:48:52,086 WARN L197 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 80 [2020-12-22 09:48:52,899 WARN L197 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 86 [2020-12-22 09:48:54,323 WARN L197 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 142 DAG size of output: 111 [2020-12-22 09:48:55,140 WARN L197 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-12-22 09:48:56,457 WARN L197 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 139 DAG size of output: 108 [2020-12-22 09:48:57,327 WARN L197 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-12-22 09:48:57,940 WARN L197 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-12-22 09:48:58,462 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-12-22 09:48:58,687 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:48:59,354 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-12-22 09:48:59,811 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-22 09:49:00,249 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-12-22 09:49:00,590 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:49:02,246 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-22 09:49:02,484 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:49:02,936 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:49:04,154 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-12-22 09:49:04,826 WARN L197 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 66 [2020-12-22 09:49:05,308 WARN L197 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-12-22 09:49:05,732 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 09:49:06,765 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-22 09:49:09,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:09,669 INFO L93 Difference]: Finished difference Result 24470 states and 31280 transitions. [2020-12-22 09:49:09,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 09:49:09,671 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-12-22 09:49:09,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:09,693 INFO L225 Difference]: With dead ends: 24470 [2020-12-22 09:49:09,693 INFO L226 Difference]: Without dead ends: 21060 [2020-12-22 09:49:09,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=1679, Invalid=6511, Unknown=0, NotChecked=0, Total=8190 [2020-12-22 09:49:09,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21060 states. [2020-12-22 09:49:10,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21060 to 10381. [2020-12-22 09:49:10,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10381 states. [2020-12-22 09:49:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10381 states to 10381 states and 13923 transitions. [2020-12-22 09:49:10,890 INFO L78 Accepts]: Start accepts. Automaton has 10381 states and 13923 transitions. Word has length 83 [2020-12-22 09:49:10,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:10,890 INFO L481 AbstractCegarLoop]: Abstraction has 10381 states and 13923 transitions. [2020-12-22 09:49:10,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 09:49:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 10381 states and 13923 transitions. [2020-12-22 09:49:10,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:49:10,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:10,891 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:11,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 09:49:11,093 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:11,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:11,094 INFO L82 PathProgramCache]: Analyzing trace with hash -852701794, now seen corresponding path program 1 times [2020-12-22 09:49:11,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:11,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952171719] [2020-12-22 09:49:11,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:11,650 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:49:11,985 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:11,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952171719] [2020-12-22 09:49:11,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177298754] [2020-12-22 09:49:11,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:12,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 09:49:12,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:13,129 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:49:13,476 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2020-12-22 09:49:13,855 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:49:14,118 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:49:14,493 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 09:49:14,505 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:49:14,912 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-12-22 09:49:15,211 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-12-22 09:49:15,230 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:49:15,233 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:49:15,238 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:49:15,649 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2020-12-22 09:49:15,902 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:49:15,912 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:49:15,913 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:49:15,915 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:49:16,710 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-12-22 09:49:17,396 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:49:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:17,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:17,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 37 [2020-12-22 09:49:17,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891084468] [2020-12-22 09:49:17,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 09:49:17,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:17,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 09:49:17,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:49:17,495 INFO L87 Difference]: Start difference. First operand 10381 states and 13923 transitions. Second operand 37 states. [2020-12-22 09:49:17,689 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2020-12-22 09:49:18,965 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2020-12-22 09:49:19,224 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2020-12-22 09:49:19,530 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2020-12-22 09:49:19,833 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2020-12-22 09:49:20,191 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-12-22 09:49:20,632 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 57 [2020-12-22 09:49:21,145 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2020-12-22 09:49:21,700 WARN L197 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 67 [2020-12-22 09:49:22,303 WARN L197 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 68 [2020-12-22 09:49:22,857 WARN L197 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-12-22 09:49:23,430 WARN L197 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-12-22 09:49:24,064 WARN L197 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2020-12-22 09:49:24,916 WARN L197 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2020-12-22 09:49:25,678 WARN L197 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-12-22 09:49:26,204 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-12-22 09:49:26,772 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2020-12-22 09:49:27,124 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-12-22 09:49:27,995 WARN L197 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2020-12-22 09:49:28,400 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2020-12-22 09:49:29,407 WARN L197 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2020-12-22 09:49:30,257 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 09:49:30,751 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-12-22 09:49:31,222 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 09:49:31,747 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 57