/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/seq-mthreaded/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:20:55,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:20:55,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:20:55,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:20:55,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:20:55,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:20:55,392 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:20:55,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:20:55,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:20:55,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:20:55,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:20:55,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:20:55,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:20:55,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:20:55,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:20:55,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:20:55,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:20:55,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:20:55,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:20:55,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:20:55,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:20:55,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:20:55,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:20:55,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:20:55,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:20:55,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:20:55,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:20:55,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:20:55,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:20:55,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:20:55,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:20:55,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:20:55,499 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:20:55,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:20:55,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:20:55,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:20:55,505 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:20:55,577 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:20:55,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:20:55,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:20:55,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:20:55,583 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:20:55,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:20:55,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:20:55,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:20:55,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:20:55,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:20:55,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:20:55,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:20:55,586 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:20:55,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:20:55,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:20:55,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:20:55,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:20:55,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:20:55,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:20:55,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:20:55,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:20:55,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:20:55,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:20:55,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:20:55,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:20:55,591 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:20:56,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:20:56,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:20:56,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:20:56,128 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:20:56,129 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:20:56,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c [2020-12-22 07:20:56,226 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98d5d78b7/5dec3249c9644c31944b8b3ccbe50406/FLAGfa9c77c84 [2020-12-22 07:20:57,067 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:20:57,069 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c [2020-12-22 07:20:57,094 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98d5d78b7/5dec3249c9644c31944b8b3ccbe50406/FLAGfa9c77c84 [2020-12-22 07:20:57,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98d5d78b7/5dec3249c9644c31944b8b3ccbe50406 [2020-12-22 07:20:57,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:20:57,319 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:20:57,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:20:57,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:20:57,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:20:57,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:57" (1/1) ... [2020-12-22 07:20:57,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@346b9b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:57, skipping insertion in model container [2020-12-22 07:20:57,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:57" (1/1) ... [2020-12-22 07:20:57,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:20:57,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:20:57,853 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/seq-mthreaded/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c[24198,24211] [2020-12-22 07:20:57,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:20:57,880 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:20:58,038 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/seq-mthreaded/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c[24198,24211] [2020-12-22 07:20:58,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:20:58,093 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:20:58,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:58 WrapperNode [2020-12-22 07:20:58,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:20:58,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:20:58,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:20:58,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:20:58,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:58" (1/1) ... [2020-12-22 07:20:58,152 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:58" (1/1) ... [2020-12-22 07:20:58,277 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:20:58,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:20:58,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:20:58,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:20:58,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:58" (1/1) ... [2020-12-22 07:20:58,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:58" (1/1) ... [2020-12-22 07:20:58,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:58" (1/1) ... [2020-12-22 07:20:58,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:58" (1/1) ... [2020-12-22 07:20:58,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:58" (1/1) ... [2020-12-22 07:20:58,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:58" (1/1) ... [2020-12-22 07:20:58,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:58" (1/1) ... [2020-12-22 07:20:58,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:20:58,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:20:58,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:20:58,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:20:58,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:58" (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 07:20:58,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:20:58,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:20:58,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:20:58,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:21:00,176 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:21:00,177 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 07:21:00,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:21:00 BoogieIcfgContainer [2020-12-22 07:21:00,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:21:00,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:21:00,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:21:00,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:21:00,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:20:57" (1/3) ... [2020-12-22 07:21:00,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70d600a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:21:00, skipping insertion in model container [2020-12-22 07:21:00,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:58" (2/3) ... [2020-12-22 07:21:00,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70d600a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:21:00, skipping insertion in model container [2020-12-22 07:21:00,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:21:00" (3/3) ... [2020-12-22 07:21:00,204 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.1.ufo.BOUNDED-8.pals.c [2020-12-22 07:21:00,213 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:21:00,221 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:21:00,256 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:21:00,321 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:21:00,321 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:21:00,322 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:21:00,322 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:21:00,322 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:21:00,322 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:21:00,322 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:21:00,323 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:21:00,362 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2020-12-22 07:21:00,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:21:00,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:00,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:00,395 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:00,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:00,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1078131632, now seen corresponding path program 1 times [2020-12-22 07:21:00,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:00,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942517768] [2020-12-22 07:21:00,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:00,925 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 07:21:00,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942517768] [2020-12-22 07:21:00,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:00,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:21:00,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501365242] [2020-12-22 07:21:00,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:21:00,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:00,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:21:00,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:21:00,966 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 2 states. [2020-12-22 07:21:01,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:01,046 INFO L93 Difference]: Finished difference Result 405 states and 714 transitions. [2020-12-22 07:21:01,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:21:01,048 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 77 [2020-12-22 07:21:01,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:01,068 INFO L225 Difference]: With dead ends: 405 [2020-12-22 07:21:01,069 INFO L226 Difference]: Without dead ends: 288 [2020-12-22 07:21:01,074 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 07:21:01,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-12-22 07:21:01,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2020-12-22 07:21:01,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-12-22 07:21:01,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 515 transitions. [2020-12-22 07:21:01,175 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 515 transitions. Word has length 77 [2020-12-22 07:21:01,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:01,176 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 515 transitions. [2020-12-22 07:21:01,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:21:01,176 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 515 transitions. [2020-12-22 07:21:01,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:21:01,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:01,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:01,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:21:01,190 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:01,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:01,194 INFO L82 PathProgramCache]: Analyzing trace with hash 944118126, now seen corresponding path program 1 times [2020-12-22 07:21:01,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:01,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420148962] [2020-12-22 07:21:01,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:01,506 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 07:21:01,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420148962] [2020-12-22 07:21:01,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:01,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:21:01,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579594373] [2020-12-22 07:21:01,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:21:01,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:01,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:21:01,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:21:01,514 INFO L87 Difference]: Start difference. First operand 288 states and 515 transitions. Second operand 5 states. [2020-12-22 07:21:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:01,732 INFO L93 Difference]: Finished difference Result 400 states and 704 transitions. [2020-12-22 07:21:01,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:21:01,733 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:21:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:01,737 INFO L225 Difference]: With dead ends: 400 [2020-12-22 07:21:01,740 INFO L226 Difference]: Without dead ends: 288 [2020-12-22 07:21:01,746 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 07:21:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-12-22 07:21:01,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2020-12-22 07:21:01,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-12-22 07:21:01,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 485 transitions. [2020-12-22 07:21:01,797 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 485 transitions. Word has length 77 [2020-12-22 07:21:01,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:01,797 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 485 transitions. [2020-12-22 07:21:01,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:21:01,798 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 485 transitions. [2020-12-22 07:21:01,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 07:21:01,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:01,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:01,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:21:01,804 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:01,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:01,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1676331028, now seen corresponding path program 1 times [2020-12-22 07:21:01,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:01,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432080471] [2020-12-22 07:21:01,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:02,090 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 07:21:02,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432080471] [2020-12-22 07:21:02,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:02,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:02,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108230107] [2020-12-22 07:21:02,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:02,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:02,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:02,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:02,100 INFO L87 Difference]: Start difference. First operand 288 states and 485 transitions. Second operand 3 states. [2020-12-22 07:21:02,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:02,179 INFO L93 Difference]: Finished difference Result 493 states and 834 transitions. [2020-12-22 07:21:02,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:02,180 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 07:21:02,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:02,189 INFO L225 Difference]: With dead ends: 493 [2020-12-22 07:21:02,190 INFO L226 Difference]: Without dead ends: 385 [2020-12-22 07:21:02,195 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 07:21:02,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-12-22 07:21:02,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 383. [2020-12-22 07:21:02,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-12-22 07:21:02,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 643 transitions. [2020-12-22 07:21:02,227 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 643 transitions. Word has length 106 [2020-12-22 07:21:02,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:02,228 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 643 transitions. [2020-12-22 07:21:02,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 643 transitions. [2020-12-22 07:21:02,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 07:21:02,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:02,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:02,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:21:02,230 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:02,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:02,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1628186862, now seen corresponding path program 1 times [2020-12-22 07:21:02,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:02,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541517011] [2020-12-22 07:21:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:02,384 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 07:21:02,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541517011] [2020-12-22 07:21:02,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:02,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:02,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442289945] [2020-12-22 07:21:02,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:02,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:02,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:02,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:02,388 INFO L87 Difference]: Start difference. First operand 383 states and 643 transitions. Second operand 3 states. [2020-12-22 07:21:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:02,435 INFO L93 Difference]: Finished difference Result 581 states and 981 transitions. [2020-12-22 07:21:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:02,436 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 109 [2020-12-22 07:21:02,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:02,440 INFO L225 Difference]: With dead ends: 581 [2020-12-22 07:21:02,440 INFO L226 Difference]: Without dead ends: 473 [2020-12-22 07:21:02,442 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 07:21:02,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-12-22 07:21:02,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 471. [2020-12-22 07:21:02,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-12-22 07:21:02,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 793 transitions. [2020-12-22 07:21:02,469 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 793 transitions. Word has length 109 [2020-12-22 07:21:02,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:02,470 INFO L481 AbstractCegarLoop]: Abstraction has 471 states and 793 transitions. [2020-12-22 07:21:02,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:02,470 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 793 transitions. [2020-12-22 07:21:02,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 07:21:02,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:02,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:02,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:21:02,474 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:02,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:02,474 INFO L82 PathProgramCache]: Analyzing trace with hash 366340874, now seen corresponding path program 1 times [2020-12-22 07:21:02,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:02,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421912746] [2020-12-22 07:21:02,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:02,603 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 07:21:02,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421912746] [2020-12-22 07:21:02,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:02,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:02,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669424897] [2020-12-22 07:21:02,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:02,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:02,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:02,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:02,606 INFO L87 Difference]: Start difference. First operand 471 states and 793 transitions. Second operand 3 states. [2020-12-22 07:21:02,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:02,660 INFO L93 Difference]: Finished difference Result 1022 states and 1724 transitions. [2020-12-22 07:21:02,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:02,661 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 109 [2020-12-22 07:21:02,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:02,667 INFO L225 Difference]: With dead ends: 1022 [2020-12-22 07:21:02,667 INFO L226 Difference]: Without dead ends: 733 [2020-12-22 07:21:02,669 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 07:21:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2020-12-22 07:21:02,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 731. [2020-12-22 07:21:02,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-22 07:21:02,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1229 transitions. [2020-12-22 07:21:02,705 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1229 transitions. Word has length 109 [2020-12-22 07:21:02,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:02,705 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1229 transitions. [2020-12-22 07:21:02,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:02,706 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1229 transitions. [2020-12-22 07:21:02,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 07:21:02,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:02,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:02,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:21:02,709 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:02,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:02,710 INFO L82 PathProgramCache]: Analyzing trace with hash 774604903, now seen corresponding path program 1 times [2020-12-22 07:21:02,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:02,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930673493] [2020-12-22 07:21:02,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:02,882 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 07:21:02,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930673493] [2020-12-22 07:21:02,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:02,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:02,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614405020] [2020-12-22 07:21:02,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:02,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:02,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:02,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:02,887 INFO L87 Difference]: Start difference. First operand 731 states and 1229 transitions. Second operand 3 states. [2020-12-22 07:21:02,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:02,936 INFO L93 Difference]: Finished difference Result 1262 states and 2126 transitions. [2020-12-22 07:21:02,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:02,937 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 07:21:02,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:02,943 INFO L225 Difference]: With dead ends: 1262 [2020-12-22 07:21:02,944 INFO L226 Difference]: Without dead ends: 973 [2020-12-22 07:21:02,949 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 07:21:02,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2020-12-22 07:21:02,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 971. [2020-12-22 07:21:02,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 971 states. [2020-12-22 07:21:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1630 transitions. [2020-12-22 07:21:02,987 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1630 transitions. Word has length 112 [2020-12-22 07:21:02,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:02,987 INFO L481 AbstractCegarLoop]: Abstraction has 971 states and 1630 transitions. [2020-12-22 07:21:02,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:02,988 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1630 transitions. [2020-12-22 07:21:02,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 07:21:02,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:02,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:02,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:21:02,990 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:02,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:02,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1082308739, now seen corresponding path program 1 times [2020-12-22 07:21:02,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:02,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404350117] [2020-12-22 07:21:02,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:03,133 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 07:21:03,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404350117] [2020-12-22 07:21:03,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:03,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:03,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462416652] [2020-12-22 07:21:03,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:03,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:03,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:03,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:03,137 INFO L87 Difference]: Start difference. First operand 971 states and 1630 transitions. Second operand 3 states. [2020-12-22 07:21:03,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:03,201 INFO L93 Difference]: Finished difference Result 2442 states and 4095 transitions. [2020-12-22 07:21:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:03,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 07:21:03,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:03,212 INFO L225 Difference]: With dead ends: 2442 [2020-12-22 07:21:03,213 INFO L226 Difference]: Without dead ends: 1666 [2020-12-22 07:21:03,216 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 07:21:03,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2020-12-22 07:21:03,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1664. [2020-12-22 07:21:03,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1664 states. [2020-12-22 07:21:03,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 2776 transitions. [2020-12-22 07:21:03,306 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 2776 transitions. Word has length 112 [2020-12-22 07:21:03,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:03,306 INFO L481 AbstractCegarLoop]: Abstraction has 1664 states and 2776 transitions. [2020-12-22 07:21:03,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:03,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 2776 transitions. [2020-12-22 07:21:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:21:03,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:03,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:03,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:21:03,312 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:03,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:03,312 INFO L82 PathProgramCache]: Analyzing trace with hash 345845541, now seen corresponding path program 1 times [2020-12-22 07:21:03,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:03,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341187259] [2020-12-22 07:21:03,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:03,512 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 07:21:03,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341187259] [2020-12-22 07:21:03,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:03,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:03,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724438551] [2020-12-22 07:21:03,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:03,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:03,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:03,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:03,516 INFO L87 Difference]: Start difference. First operand 1664 states and 2776 transitions. Second operand 3 states. [2020-12-22 07:21:03,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:03,609 INFO L93 Difference]: Finished difference Result 3049 states and 5099 transitions. [2020-12-22 07:21:03,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:03,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2020-12-22 07:21:03,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:03,626 INFO L225 Difference]: With dead ends: 3049 [2020-12-22 07:21:03,626 INFO L226 Difference]: Without dead ends: 2273 [2020-12-22 07:21:03,629 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 07:21:03,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2020-12-22 07:21:03,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 2271. [2020-12-22 07:21:03,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2271 states. [2020-12-22 07:21:03,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 3779 transitions. [2020-12-22 07:21:03,741 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 3779 transitions. Word has length 115 [2020-12-22 07:21:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:03,742 INFO L481 AbstractCegarLoop]: Abstraction has 2271 states and 3779 transitions. [2020-12-22 07:21:03,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:03,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 3779 transitions. [2020-12-22 07:21:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:21:03,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:03,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:03,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:21:03,746 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:03,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:03,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1349045569, now seen corresponding path program 1 times [2020-12-22 07:21:03,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:03,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114064255] [2020-12-22 07:21:03,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:03,903 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 07:21:03,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114064255] [2020-12-22 07:21:03,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:03,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:03,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000663861] [2020-12-22 07:21:03,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:03,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:03,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:03,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:03,916 INFO L87 Difference]: Start difference. First operand 2271 states and 3779 transitions. Second operand 3 states. [2020-12-22 07:21:04,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:04,046 INFO L93 Difference]: Finished difference Result 6154 states and 10198 transitions. [2020-12-22 07:21:04,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:04,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2020-12-22 07:21:04,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:04,075 INFO L225 Difference]: With dead ends: 6154 [2020-12-22 07:21:04,076 INFO L226 Difference]: Without dead ends: 4091 [2020-12-22 07:21:04,081 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 07:21:04,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4091 states. [2020-12-22 07:21:04,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4091 to 4089. [2020-12-22 07:21:04,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4089 states. [2020-12-22 07:21:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4089 states to 4089 states and 6731 transitions. [2020-12-22 07:21:04,320 INFO L78 Accepts]: Start accepts. Automaton has 4089 states and 6731 transitions. Word has length 115 [2020-12-22 07:21:04,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:04,321 INFO L481 AbstractCegarLoop]: Abstraction has 4089 states and 6731 transitions. [2020-12-22 07:21:04,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:04,321 INFO L276 IsEmpty]: Start isEmpty. Operand 4089 states and 6731 transitions. [2020-12-22 07:21:04,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 07:21:04,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:04,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:04,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:21:04,326 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:04,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:04,327 INFO L82 PathProgramCache]: Analyzing trace with hash 613191678, now seen corresponding path program 1 times [2020-12-22 07:21:04,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:04,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081598127] [2020-12-22 07:21:04,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:04,473 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 07:21:04,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081598127] [2020-12-22 07:21:04,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:04,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:04,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364397665] [2020-12-22 07:21:04,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:04,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:04,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:04,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:04,480 INFO L87 Difference]: Start difference. First operand 4089 states and 6731 transitions. Second operand 3 states. [2020-12-22 07:21:04,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:04,655 INFO L93 Difference]: Finished difference Result 7688 states and 12684 transitions. [2020-12-22 07:21:04,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:04,657 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2020-12-22 07:21:04,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:04,690 INFO L225 Difference]: With dead ends: 7688 [2020-12-22 07:21:04,691 INFO L226 Difference]: Without dead ends: 5625 [2020-12-22 07:21:04,696 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 07:21:04,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5625 states. [2020-12-22 07:21:04,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5625 to 5623. [2020-12-22 07:21:04,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5623 states. [2020-12-22 07:21:04,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5623 states to 5623 states and 9216 transitions. [2020-12-22 07:21:04,923 INFO L78 Accepts]: Start accepts. Automaton has 5623 states and 9216 transitions. Word has length 118 [2020-12-22 07:21:04,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:04,924 INFO L481 AbstractCegarLoop]: Abstraction has 5623 states and 9216 transitions. [2020-12-22 07:21:04,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:04,924 INFO L276 IsEmpty]: Start isEmpty. Operand 5623 states and 9216 transitions. [2020-12-22 07:21:04,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 07:21:04,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:04,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:04,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:21:04,927 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:04,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:04,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1630772250, now seen corresponding path program 1 times [2020-12-22 07:21:04,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:04,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652636687] [2020-12-22 07:21:04,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:05,215 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 07:21:05,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652636687] [2020-12-22 07:21:05,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:05,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:21:05,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279161009] [2020-12-22 07:21:05,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:21:05,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:05,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:21:05,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:21:05,220 INFO L87 Difference]: Start difference. First operand 5623 states and 9216 transitions. Second operand 6 states. [2020-12-22 07:21:06,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:06,444 INFO L93 Difference]: Finished difference Result 34207 states and 56459 transitions. [2020-12-22 07:21:06,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:21:06,445 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2020-12-22 07:21:06,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:06,551 INFO L225 Difference]: With dead ends: 34207 [2020-12-22 07:21:06,552 INFO L226 Difference]: Without dead ends: 28805 [2020-12-22 07:21:06,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:21:06,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28805 states. [2020-12-22 07:21:07,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28805 to 10955. [2020-12-22 07:21:07,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10955 states. [2020-12-22 07:21:07,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10955 states to 10955 states and 17833 transitions. [2020-12-22 07:21:07,346 INFO L78 Accepts]: Start accepts. Automaton has 10955 states and 17833 transitions. Word has length 118 [2020-12-22 07:21:07,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:07,346 INFO L481 AbstractCegarLoop]: Abstraction has 10955 states and 17833 transitions. [2020-12-22 07:21:07,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:21:07,347 INFO L276 IsEmpty]: Start isEmpty. Operand 10955 states and 17833 transitions. [2020-12-22 07:21:07,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 07:21:07,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:07,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:07,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:21:07,350 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:07,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:07,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1214692757, now seen corresponding path program 1 times [2020-12-22 07:21:07,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:07,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105006834] [2020-12-22 07:21:07,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:07,554 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 07:21:07,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105006834] [2020-12-22 07:21:07,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:07,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:07,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268326296] [2020-12-22 07:21:07,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:07,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:07,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:07,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:07,558 INFO L87 Difference]: Start difference. First operand 10955 states and 17833 transitions. Second operand 4 states. [2020-12-22 07:21:08,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:08,503 INFO L93 Difference]: Finished difference Result 32409 states and 53121 transitions. [2020-12-22 07:21:08,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:08,503 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2020-12-22 07:21:08,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:08,572 INFO L225 Difference]: With dead ends: 32409 [2020-12-22 07:21:08,573 INFO L226 Difference]: Without dead ends: 21675 [2020-12-22 07:21:08,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:08,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21675 states. [2020-12-22 07:21:09,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21675 to 18000. [2020-12-22 07:21:09,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18000 states. [2020-12-22 07:21:09,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18000 states to 18000 states and 29332 transitions. [2020-12-22 07:21:09,645 INFO L78 Accepts]: Start accepts. Automaton has 18000 states and 29332 transitions. Word has length 119 [2020-12-22 07:21:09,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:09,646 INFO L481 AbstractCegarLoop]: Abstraction has 18000 states and 29332 transitions. [2020-12-22 07:21:09,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:09,646 INFO L276 IsEmpty]: Start isEmpty. Operand 18000 states and 29332 transitions. [2020-12-22 07:21:09,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 07:21:09,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:09,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:09,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:21:09,648 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:09,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1370134705, now seen corresponding path program 1 times [2020-12-22 07:21:09,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:09,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664620574] [2020-12-22 07:21:09,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:09,757 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 07:21:09,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664620574] [2020-12-22 07:21:09,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:09,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:09,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832326656] [2020-12-22 07:21:09,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:09,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:09,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:09,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:09,760 INFO L87 Difference]: Start difference. First operand 18000 states and 29332 transitions. Second operand 4 states. [2020-12-22 07:21:11,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:11,066 INFO L93 Difference]: Finished difference Result 52867 states and 86391 transitions. [2020-12-22 07:21:11,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:11,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2020-12-22 07:21:11,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:11,202 INFO L225 Difference]: With dead ends: 52867 [2020-12-22 07:21:11,202 INFO L226 Difference]: Without dead ends: 35088 [2020-12-22 07:21:11,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:21:11,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35088 states. [2020-12-22 07:21:12,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35088 to 29437. [2020-12-22 07:21:12,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29437 states. [2020-12-22 07:21:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29437 states to 29437 states and 47781 transitions. [2020-12-22 07:21:12,761 INFO L78 Accepts]: Start accepts. Automaton has 29437 states and 47781 transitions. Word has length 120 [2020-12-22 07:21:12,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:12,762 INFO L481 AbstractCegarLoop]: Abstraction has 29437 states and 47781 transitions. [2020-12-22 07:21:12,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:12,762 INFO L276 IsEmpty]: Start isEmpty. Operand 29437 states and 47781 transitions. [2020-12-22 07:21:12,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 07:21:12,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:12,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:12,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:21:12,765 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:12,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:12,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2062872140, now seen corresponding path program 1 times [2020-12-22 07:21:12,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:12,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958344394] [2020-12-22 07:21:12,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:12,875 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 07:21:12,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958344394] [2020-12-22 07:21:12,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:12,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:12,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447092079] [2020-12-22 07:21:12,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:12,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:12,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:12,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:12,878 INFO L87 Difference]: Start difference. First operand 29437 states and 47781 transitions. Second operand 4 states. [2020-12-22 07:21:14,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:14,656 INFO L93 Difference]: Finished difference Result 85939 states and 139899 transitions. [2020-12-22 07:21:14,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:14,657 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 121 [2020-12-22 07:21:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:14,829 INFO L225 Difference]: With dead ends: 85939 [2020-12-22 07:21:14,830 INFO L226 Difference]: Without dead ends: 56723 [2020-12-22 07:21:14,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:21:14,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56723 states. [2020-12-22 07:21:16,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56723 to 47882. [2020-12-22 07:21:16,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47882 states. [2020-12-22 07:21:16,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47882 states to 47882 states and 77418 transitions. [2020-12-22 07:21:16,833 INFO L78 Accepts]: Start accepts. Automaton has 47882 states and 77418 transitions. Word has length 121 [2020-12-22 07:21:16,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:16,834 INFO L481 AbstractCegarLoop]: Abstraction has 47882 states and 77418 transitions. [2020-12-22 07:21:16,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:16,834 INFO L276 IsEmpty]: Start isEmpty. Operand 47882 states and 77418 transitions. [2020-12-22 07:21:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 07:21:16,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:16,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:16,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:21:16,838 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:16,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:16,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2063066808, now seen corresponding path program 1 times [2020-12-22 07:21:16,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:16,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723037864] [2020-12-22 07:21:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:16,971 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 07:21:16,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723037864] [2020-12-22 07:21:16,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:16,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:16,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823705983] [2020-12-22 07:21:16,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:16,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:16,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:16,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:16,974 INFO L87 Difference]: Start difference. First operand 47882 states and 77418 transitions. Second operand 4 states. [2020-12-22 07:21:19,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:19,243 INFO L93 Difference]: Finished difference Result 137691 states and 223311 transitions. [2020-12-22 07:21:19,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:19,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2020-12-22 07:21:19,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:19,448 INFO L225 Difference]: With dead ends: 137691 [2020-12-22 07:21:19,449 INFO L226 Difference]: Without dead ends: 90030 [2020-12-22 07:21:19,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:19,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90030 states. [2020-12-22 07:21:22,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90030 to 76931. [2020-12-22 07:21:22,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76931 states. [2020-12-22 07:21:22,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76931 states to 76931 states and 123919 transitions. [2020-12-22 07:21:22,447 INFO L78 Accepts]: Start accepts. Automaton has 76931 states and 123919 transitions. Word has length 122 [2020-12-22 07:21:22,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:22,448 INFO L481 AbstractCegarLoop]: Abstraction has 76931 states and 123919 transitions. [2020-12-22 07:21:22,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:22,448 INFO L276 IsEmpty]: Start isEmpty. Operand 76931 states and 123919 transitions. [2020-12-22 07:21:22,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 07:21:22,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:22,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:22,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:21:22,450 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:22,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:22,451 INFO L82 PathProgramCache]: Analyzing trace with hash -548465248, now seen corresponding path program 1 times [2020-12-22 07:21:22,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:22,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849941497] [2020-12-22 07:21:22,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:22,713 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 07:21:22,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849941497] [2020-12-22 07:21:22,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:22,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:21:22,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647924490] [2020-12-22 07:21:22,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:21:22,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:22,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:21:22,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:21:22,715 INFO L87 Difference]: Start difference. First operand 76931 states and 123919 transitions. Second operand 6 states. [2020-12-22 07:21:25,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:25,899 INFO L93 Difference]: Finished difference Result 185505 states and 299631 transitions. [2020-12-22 07:21:25,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:21:25,900 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2020-12-22 07:21:25,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:26,130 INFO L225 Difference]: With dead ends: 185505 [2020-12-22 07:21:26,131 INFO L226 Difference]: Without dead ends: 108795 [2020-12-22 07:21:26,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:21:26,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108795 states. [2020-12-22 07:21:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108795 to 76931. [2020-12-22 07:21:28,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76931 states. [2020-12-22 07:21:29,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76931 states to 76931 states and 123294 transitions. [2020-12-22 07:21:29,090 INFO L78 Accepts]: Start accepts. Automaton has 76931 states and 123294 transitions. Word has length 124 [2020-12-22 07:21:29,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:29,090 INFO L481 AbstractCegarLoop]: Abstraction has 76931 states and 123294 transitions. [2020-12-22 07:21:29,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:21:29,090 INFO L276 IsEmpty]: Start isEmpty. Operand 76931 states and 123294 transitions. [2020-12-22 07:21:29,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:21:29,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:29,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:29,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:21:29,093 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:29,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:29,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1974939087, now seen corresponding path program 1 times [2020-12-22 07:21:29,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:29,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137376448] [2020-12-22 07:21:29,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:29,300 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 07:21:29,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137376448] [2020-12-22 07:21:29,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:29,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:21:29,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512837334] [2020-12-22 07:21:29,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:21:29,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:29,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:21:29,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:21:29,303 INFO L87 Difference]: Start difference. First operand 76931 states and 123294 transitions. Second operand 6 states. [2020-12-22 07:21:33,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:33,333 INFO L93 Difference]: Finished difference Result 221524 states and 356287 transitions. [2020-12-22 07:21:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:21:33,333 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2020-12-22 07:21:33,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:33,738 INFO L225 Difference]: With dead ends: 221524 [2020-12-22 07:21:33,738 INFO L226 Difference]: Without dead ends: 144814 [2020-12-22 07:21:33,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:21:33,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144814 states. [2020-12-22 07:21:38,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144814 to 144810. [2020-12-22 07:21:38,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144810 states. [2020-12-22 07:21:38,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144810 states to 144810 states and 231735 transitions. [2020-12-22 07:21:38,831 INFO L78 Accepts]: Start accepts. Automaton has 144810 states and 231735 transitions. Word has length 127 [2020-12-22 07:21:38,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:38,831 INFO L481 AbstractCegarLoop]: Abstraction has 144810 states and 231735 transitions. [2020-12-22 07:21:38,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:21:38,831 INFO L276 IsEmpty]: Start isEmpty. Operand 144810 states and 231735 transitions. [2020-12-22 07:21:38,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 07:21:38,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:38,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:38,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:21:38,842 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:38,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:38,849 INFO L82 PathProgramCache]: Analyzing trace with hash 662224137, now seen corresponding path program 1 times [2020-12-22 07:21:38,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:38,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264624098] [2020-12-22 07:21:38,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:39,044 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 07:21:39,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264624098] [2020-12-22 07:21:39,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:39,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:21:39,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096879929] [2020-12-22 07:21:39,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:21:39,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:39,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:21:39,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:21:39,047 INFO L87 Difference]: Start difference. First operand 144810 states and 231735 transitions. Second operand 8 states. [2020-12-22 07:21:47,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:47,714 INFO L93 Difference]: Finished difference Result 286433 states and 454081 transitions. [2020-12-22 07:21:47,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:21:47,715 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 128 [2020-12-22 07:21:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:48,282 INFO L225 Difference]: With dead ends: 286433 [2020-12-22 07:21:48,283 INFO L226 Difference]: Without dead ends: 286431 [2020-12-22 07:21:48,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:21:48,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286431 states. [2020-12-22 07:21:54,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286431 to 150750. [2020-12-22 07:21:54,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150750 states. [2020-12-22 07:21:55,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150750 states to 150750 states and 237648 transitions. [2020-12-22 07:21:55,416 INFO L78 Accepts]: Start accepts. Automaton has 150750 states and 237648 transitions. Word has length 128 [2020-12-22 07:21:55,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:55,417 INFO L481 AbstractCegarLoop]: Abstraction has 150750 states and 237648 transitions. [2020-12-22 07:21:55,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:21:55,417 INFO L276 IsEmpty]: Start isEmpty. Operand 150750 states and 237648 transitions. [2020-12-22 07:21:55,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 07:21:55,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:55,453 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:55,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:21:55,453 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:55,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:55,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1701810355, now seen corresponding path program 1 times [2020-12-22 07:21:55,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:55,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412141665] [2020-12-22 07:21:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:55,662 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 07:21:55,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412141665] [2020-12-22 07:21:55,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:55,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:21:55,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211736524] [2020-12-22 07:21:55,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:21:55,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:55,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:21:55,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:21:55,664 INFO L87 Difference]: Start difference. First operand 150750 states and 237648 transitions. Second operand 6 states. [2020-12-22 07:22:03,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:03,458 INFO L93 Difference]: Finished difference Result 281996 states and 450013 transitions. [2020-12-22 07:22:03,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:22:03,459 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2020-12-22 07:22:03,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:03,929 INFO L225 Difference]: With dead ends: 281996 [2020-12-22 07:22:03,930 INFO L226 Difference]: Without dead ends: 233970 [2020-12-22 07:22:04,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:22:04,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233970 states. [2020-12-22 07:22:12,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233970 to 191322. [2020-12-22 07:22:12,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191322 states. [2020-12-22 07:22:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191322 states to 191322 states and 302740 transitions. [2020-12-22 07:22:12,456 INFO L78 Accepts]: Start accepts. Automaton has 191322 states and 302740 transitions. Word has length 163 [2020-12-22 07:22:12,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:12,456 INFO L481 AbstractCegarLoop]: Abstraction has 191322 states and 302740 transitions. [2020-12-22 07:22:12,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:22:12,457 INFO L276 IsEmpty]: Start isEmpty. Operand 191322 states and 302740 transitions. [2020-12-22 07:22:12,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 07:22:12,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:12,468 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:12,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:22:12,468 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:12,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:12,469 INFO L82 PathProgramCache]: Analyzing trace with hash -666615827, now seen corresponding path program 1 times [2020-12-22 07:22:12,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:12,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545422931] [2020-12-22 07:22:12,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:13,024 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 07:22:13,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545422931] [2020-12-22 07:22:13,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:13,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:22:13,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765540666] [2020-12-22 07:22:13,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:22:13,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:13,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:22:13,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:22:13,027 INFO L87 Difference]: Start difference. First operand 191322 states and 302740 transitions. Second operand 6 states. [2020-12-22 07:22:21,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:21,633 INFO L93 Difference]: Finished difference Result 293624 states and 467955 transitions. [2020-12-22 07:22:21,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:22:21,633 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2020-12-22 07:22:21,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:22,154 INFO L225 Difference]: With dead ends: 293624 [2020-12-22 07:22:22,154 INFO L226 Difference]: Without dead ends: 252622 [2020-12-22 07:22:22,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:22:22,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252622 states. [2020-12-22 07:22:30,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252622 to 211314. [2020-12-22 07:22:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211314 states. [2020-12-22 07:22:31,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211314 states to 211314 states and 334560 transitions. [2020-12-22 07:22:31,798 INFO L78 Accepts]: Start accepts. Automaton has 211314 states and 334560 transitions. Word has length 163 [2020-12-22 07:22:31,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:31,800 INFO L481 AbstractCegarLoop]: Abstraction has 211314 states and 334560 transitions. [2020-12-22 07:22:31,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:22:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 211314 states and 334560 transitions. [2020-12-22 07:22:31,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 07:22:31,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:31,810 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:31,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:22:31,811 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:31,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:31,811 INFO L82 PathProgramCache]: Analyzing trace with hash 822278682, now seen corresponding path program 1 times [2020-12-22 07:22:31,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:31,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173289689] [2020-12-22 07:22:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:31,990 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 07:22:31,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173289689] [2020-12-22 07:22:31,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:31,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:22:31,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535915907] [2020-12-22 07:22:31,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:22:31,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:31,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:22:31,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:22:31,992 INFO L87 Difference]: Start difference. First operand 211314 states and 334560 transitions. Second operand 6 states. [2020-12-22 07:22:40,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:40,329 INFO L93 Difference]: Finished difference Result 285364 states and 454015 transitions. [2020-12-22 07:22:40,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:22:40,330 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2020-12-22 07:22:40,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:40,825 INFO L225 Difference]: With dead ends: 285364 [2020-12-22 07:22:40,826 INFO L226 Difference]: Without dead ends: 244362 [2020-12-22 07:22:40,898 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 07:22:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244362 states. [2020-12-22 07:22:51,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244362 to 231306. [2020-12-22 07:22:51,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231306 states. [2020-12-22 07:22:52,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231306 states to 231306 states and 366380 transitions. [2020-12-22 07:22:52,552 INFO L78 Accepts]: Start accepts. Automaton has 231306 states and 366380 transitions. Word has length 163 [2020-12-22 07:22:52,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:52,552 INFO L481 AbstractCegarLoop]: Abstraction has 231306 states and 366380 transitions. [2020-12-22 07:22:52,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:22:52,552 INFO L276 IsEmpty]: Start isEmpty. Operand 231306 states and 366380 transitions. [2020-12-22 07:22:52,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 07:22:52,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:52,564 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:52,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:22:52,565 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:52,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:52,565 INFO L82 PathProgramCache]: Analyzing trace with hash 93542074, now seen corresponding path program 1 times [2020-12-22 07:22:52,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:52,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185224906] [2020-12-22 07:22:52,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:52,749 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 07:22:52,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185224906] [2020-12-22 07:22:52,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:52,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:22:52,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993319159] [2020-12-22 07:22:52,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:22:52,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:52,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:22:52,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:22:52,756 INFO L87 Difference]: Start difference. First operand 231306 states and 366380 transitions. Second operand 6 states. [2020-12-22 07:23:03,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:03,291 INFO L93 Difference]: Finished difference Result 331088 states and 527503 transitions. [2020-12-22 07:23:03,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:23:03,294 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2020-12-22 07:23:03,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:03,937 INFO L225 Difference]: With dead ends: 331088 [2020-12-22 07:23:03,937 INFO L226 Difference]: Without dead ends: 290086 [2020-12-22 07:23:04,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:23:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290086 states. [2020-12-22 07:23:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290086 to 251298. [2020-12-22 07:23:14,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251298 states. [2020-12-22 07:23:15,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251298 states to 251298 states and 398200 transitions. [2020-12-22 07:23:15,840 INFO L78 Accepts]: Start accepts. Automaton has 251298 states and 398200 transitions. Word has length 163 [2020-12-22 07:23:15,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:15,841 INFO L481 AbstractCegarLoop]: Abstraction has 251298 states and 398200 transitions. [2020-12-22 07:23:15,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:23:15,841 INFO L276 IsEmpty]: Start isEmpty. Operand 251298 states and 398200 transitions. [2020-12-22 07:23:15,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-22 07:23:15,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:15,852 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:23:15,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:23:15,853 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:15,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:15,855 INFO L82 PathProgramCache]: Analyzing trace with hash -641215705, now seen corresponding path program 1 times [2020-12-22 07:23:15,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:15,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193314068] [2020-12-22 07:23:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:16,380 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 07:23:16,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193314068] [2020-12-22 07:23:16,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:16,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:23:16,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997008178] [2020-12-22 07:23:16,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:23:16,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:16,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:23:16,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:23:16,382 INFO L87 Difference]: Start difference. First operand 251298 states and 398200 transitions. Second operand 6 states. [2020-12-22 07:23:42,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:42,509 INFO L93 Difference]: Finished difference Result 740771 states and 1174209 transitions. [2020-12-22 07:23:42,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:23:42,509 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2020-12-22 07:23:42,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:43,862 INFO L225 Difference]: With dead ends: 740771 [2020-12-22 07:23:43,862 INFO L226 Difference]: Without dead ends: 609937 [2020-12-22 07:23:44,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:23:44,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609937 states. [2020-12-22 07:24:09,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609937 to 461180. [2020-12-22 07:24:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461180 states. [2020-12-22 07:24:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461180 states to 461180 states and 732863 transitions. [2020-12-22 07:24:11,704 INFO L78 Accepts]: Start accepts. Automaton has 461180 states and 732863 transitions. Word has length 164 [2020-12-22 07:24:11,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:11,705 INFO L481 AbstractCegarLoop]: Abstraction has 461180 states and 732863 transitions. [2020-12-22 07:24:11,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:24:11,705 INFO L276 IsEmpty]: Start isEmpty. Operand 461180 states and 732863 transitions. [2020-12-22 07:24:11,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-22 07:24:11,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:11,717 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:11,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:24:11,717 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:11,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:11,733 INFO L82 PathProgramCache]: Analyzing trace with hash 983847106, now seen corresponding path program 1 times [2020-12-22 07:24:11,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:11,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579583873] [2020-12-22 07:24:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:11,858 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:24:11,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579583873] [2020-12-22 07:24:11,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:11,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:11,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204869936] [2020-12-22 07:24:11,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:11,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:11,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:11,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:11,861 INFO L87 Difference]: Start difference. First operand 461180 states and 732863 transitions. Second operand 4 states.