/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:56:28,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:56:28,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:56:28,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:56:28,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:56:28,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:56:28,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:56:28,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:56:28,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:56:28,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:56:28,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:56:28,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:56:28,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:56:28,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:56:28,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:56:28,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:56:28,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:56:28,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:56:28,466 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:56:28,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:56:28,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:56:28,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:56:28,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:56:28,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:56:28,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:56:28,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:56:28,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:56:28,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:56:28,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:56:28,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:56:28,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:56:28,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:56:28,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:56:28,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:56:28,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:56:28,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:56:28,504 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:56:28,554 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:56:28,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:56:28,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:56:28,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:56:28,558 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:56:28,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:56:28,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:56:28,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:56:28,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:56:28,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:56:28,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:56:28,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:56:28,561 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:56:28,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:56:28,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:56:28,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:56:28,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:56:28,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:56:28,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:56:28,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:56:28,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:56:28,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:56:28,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:56:28,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:56:28,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:56:28,563 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:56:28,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:56:28,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:56:28,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:56:28,954 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:56:28,955 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:56:28,956 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label00.c [2020-12-22 09:56:29,030 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d29fe160/1740865282ad419793441f4f6f7115be/FLAG33daefad6 [2020-12-22 09:56:30,160 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:56:30,161 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label00.c [2020-12-22 09:56:30,214 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d29fe160/1740865282ad419793441f4f6f7115be/FLAG33daefad6 [2020-12-22 09:56:30,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d29fe160/1740865282ad419793441f4f6f7115be [2020-12-22 09:56:30,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:56:30,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:56:30,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:56:30,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:56:30,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:56:30,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:56:30" (1/1) ... [2020-12-22 09:56:30,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63382f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:30, skipping insertion in model container [2020-12-22 09:56:30,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:56:30" (1/1) ... [2020-12-22 09:56:30,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:56:30,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:56:31,229 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label00.c[11758,11771] [2020-12-22 09:56:31,261 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label00.c[13390,13403] [2020-12-22 09:56:32,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:56:32,375 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:56:32,452 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label00.c[11758,11771] [2020-12-22 09:56:32,459 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label00.c[13390,13403] [2020-12-22 09:56:33,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:56:33,201 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:56:33,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:33 WrapperNode [2020-12-22 09:56:33,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:56:33,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:56:33,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:56:33,205 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:56:33,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:33" (1/1) ... [2020-12-22 09:56:33,296 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:33" (1/1) ... [2020-12-22 09:56:33,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:56:33,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:56:33,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:56:33,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:56:33,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:33" (1/1) ... [2020-12-22 09:56:33,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:33" (1/1) ... [2020-12-22 09:56:33,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:33" (1/1) ... [2020-12-22 09:56:33,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:33" (1/1) ... [2020-12-22 09:56:34,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:33" (1/1) ... [2020-12-22 09:56:34,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:33" (1/1) ... [2020-12-22 09:56:34,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:33" (1/1) ... [2020-12-22 09:56:34,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:56:34,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:56:34,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:56:34,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:56:34,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:56:34,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:56:34,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:56:34,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:56:34,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:56:40,226 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:56:40,226 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:56:40,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:56:40 BoogieIcfgContainer [2020-12-22 09:56:40,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:56:40,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:56:40,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:56:40,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:56:40,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:56:30" (1/3) ... [2020-12-22 09:56:40,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c51afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:56:40, skipping insertion in model container [2020-12-22 09:56:40,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:33" (2/3) ... [2020-12-22 09:56:40,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c51afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:56:40, skipping insertion in model container [2020-12-22 09:56:40,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:56:40" (3/3) ... [2020-12-22 09:56:40,239 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label00.c [2020-12-22 09:56:40,246 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:56:40,252 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:56:40,271 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:56:40,310 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:56:40,310 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:56:40,310 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:56:40,311 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:56:40,311 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:56:40,311 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:56:40,311 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:56:40,311 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:56:40,350 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-12-22 09:56:40,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 09:56:40,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:40,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:40,358 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:40,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:40,364 INFO L82 PathProgramCache]: Analyzing trace with hash 211879157, now seen corresponding path program 1 times [2020-12-22 09:56:40,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:40,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476879926] [2020-12-22 09:56:40,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:40,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476879926] [2020-12-22 09:56:40,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:40,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:56:40,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617688856] [2020-12-22 09:56:40,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:40,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:40,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:40,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:40,683 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 3 states. [2020-12-22 09:56:46,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:46,918 INFO L93 Difference]: Finished difference Result 2536 states and 4878 transitions. [2020-12-22 09:56:46,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:46,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-12-22 09:56:46,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:46,952 INFO L225 Difference]: With dead ends: 2536 [2020-12-22 09:56:46,952 INFO L226 Difference]: Without dead ends: 1595 [2020-12-22 09:56:46,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:46,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2020-12-22 09:56:47,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1595. [2020-12-22 09:56:47,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1595 states. [2020-12-22 09:56:47,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2618 transitions. [2020-12-22 09:56:47,104 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2618 transitions. Word has length 16 [2020-12-22 09:56:47,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:47,104 INFO L481 AbstractCegarLoop]: Abstraction has 1595 states and 2618 transitions. [2020-12-22 09:56:47,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:47,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2618 transitions. [2020-12-22 09:56:47,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:56:47,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:47,107 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] [2020-12-22 09:56:47,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:56:47,107 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:47,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:47,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2020-12-22 09:56:47,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:47,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199645840] [2020-12-22 09:56:47,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:47,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199645840] [2020-12-22 09:56:47,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:47,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:56:47,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109318562] [2020-12-22 09:56:47,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:56:47,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:47,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:56:47,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:56:47,302 INFO L87 Difference]: Start difference. First operand 1595 states and 2618 transitions. Second operand 5 states. [2020-12-22 09:56:47,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:47,416 INFO L93 Difference]: Finished difference Result 1652 states and 2706 transitions. [2020-12-22 09:56:47,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:56:47,417 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:56:47,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:47,426 INFO L225 Difference]: With dead ends: 1652 [2020-12-22 09:56:47,427 INFO L226 Difference]: Without dead ends: 1595 [2020-12-22 09:56:47,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:47,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2020-12-22 09:56:47,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1595. [2020-12-22 09:56:47,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1595 states. [2020-12-22 09:56:47,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2587 transitions. [2020-12-22 09:56:47,474 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2587 transitions. Word has length 34 [2020-12-22 09:56:47,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:47,475 INFO L481 AbstractCegarLoop]: Abstraction has 1595 states and 2587 transitions. [2020-12-22 09:56:47,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:56:47,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2587 transitions. [2020-12-22 09:56:47,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:56:47,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:47,478 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] [2020-12-22 09:56:47,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:56:47,478 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:47,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:47,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2020-12-22 09:56:47,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:47,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100403432] [2020-12-22 09:56:47,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:47,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100403432] [2020-12-22 09:56:47,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:47,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:47,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598902781] [2020-12-22 09:56:47,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:47,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:47,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:47,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:47,657 INFO L87 Difference]: Start difference. First operand 1595 states and 2587 transitions. Second operand 3 states. [2020-12-22 09:56:47,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:47,705 INFO L93 Difference]: Finished difference Result 1695 states and 2745 transitions. [2020-12-22 09:56:47,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:47,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:56:47,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:47,715 INFO L225 Difference]: With dead ends: 1695 [2020-12-22 09:56:47,716 INFO L226 Difference]: Without dead ends: 1642 [2020-12-22 09:56:47,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:47,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2020-12-22 09:56:47,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1640. [2020-12-22 09:56:47,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1640 states. [2020-12-22 09:56:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 2659 transitions. [2020-12-22 09:56:47,781 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 2659 transitions. Word has length 64 [2020-12-22 09:56:47,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:47,782 INFO L481 AbstractCegarLoop]: Abstraction has 1640 states and 2659 transitions. [2020-12-22 09:56:47,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:47,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 2659 transitions. [2020-12-22 09:56:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:56:47,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:47,788 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] [2020-12-22 09:56:47,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:56:47,790 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:47,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:47,790 INFO L82 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2020-12-22 09:56:47,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:47,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017643497] [2020-12-22 09:56:47,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:47,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017643497] [2020-12-22 09:56:47,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:47,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:47,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005356202] [2020-12-22 09:56:47,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:47,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:47,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:47,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:47,989 INFO L87 Difference]: Start difference. First operand 1640 states and 2659 transitions. Second operand 7 states. [2020-12-22 09:56:48,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:48,327 INFO L93 Difference]: Finished difference Result 2620 states and 4219 transitions. [2020-12-22 09:56:48,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:56:48,328 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:56:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:48,345 INFO L225 Difference]: With dead ends: 2620 [2020-12-22 09:56:48,345 INFO L226 Difference]: Without dead ends: 2522 [2020-12-22 09:56:48,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:56:48,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2020-12-22 09:56:48,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 1736. [2020-12-22 09:56:48,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-12-22 09:56:48,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2810 transitions. [2020-12-22 09:56:48,415 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2810 transitions. Word has length 64 [2020-12-22 09:56:48,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:48,418 INFO L481 AbstractCegarLoop]: Abstraction has 1736 states and 2810 transitions. [2020-12-22 09:56:48,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:48,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2810 transitions. [2020-12-22 09:56:48,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:56:48,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:48,421 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] [2020-12-22 09:56:48,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:56:48,422 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:48,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:48,423 INFO L82 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2020-12-22 09:56:48,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:48,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259521128] [2020-12-22 09:56:48,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:48,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259521128] [2020-12-22 09:56:48,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:48,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:48,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558223988] [2020-12-22 09:56:48,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:48,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:48,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:48,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:48,566 INFO L87 Difference]: Start difference. First operand 1736 states and 2810 transitions. Second operand 3 states. [2020-12-22 09:56:48,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:48,638 INFO L93 Difference]: Finished difference Result 2102 states and 3386 transitions. [2020-12-22 09:56:48,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:48,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:56:48,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:48,651 INFO L225 Difference]: With dead ends: 2102 [2020-12-22 09:56:48,651 INFO L226 Difference]: Without dead ends: 1908 [2020-12-22 09:56:48,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:48,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2020-12-22 09:56:48,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1902. [2020-12-22 09:56:48,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1902 states. [2020-12-22 09:56:48,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 3064 transitions. [2020-12-22 09:56:48,724 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 3064 transitions. Word has length 66 [2020-12-22 09:56:48,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:48,726 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 3064 transitions. [2020-12-22 09:56:48,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 3064 transitions. [2020-12-22 09:56:48,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:56:48,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:48,728 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] [2020-12-22 09:56:48,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:56:48,729 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:48,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:48,729 INFO L82 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2020-12-22 09:56:48,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:48,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854557591] [2020-12-22 09:56:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:49,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854557591] [2020-12-22 09:56:49,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:49,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:49,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789585283] [2020-12-22 09:56:49,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:49,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:49,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:49,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:49,028 INFO L87 Difference]: Start difference. First operand 1902 states and 3064 transitions. Second operand 7 states. [2020-12-22 09:56:49,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:49,288 INFO L93 Difference]: Finished difference Result 2264 states and 3626 transitions. [2020-12-22 09:56:49,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:49,288 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:56:49,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:49,301 INFO L225 Difference]: With dead ends: 2264 [2020-12-22 09:56:49,301 INFO L226 Difference]: Without dead ends: 1904 [2020-12-22 09:56:49,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:56:49,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2020-12-22 09:56:49,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1902. [2020-12-22 09:56:49,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1902 states. [2020-12-22 09:56:49,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 3060 transitions. [2020-12-22 09:56:49,370 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 3060 transitions. Word has length 66 [2020-12-22 09:56:49,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:49,371 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 3060 transitions. [2020-12-22 09:56:49,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:49,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 3060 transitions. [2020-12-22 09:56:49,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:56:49,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:49,373 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] [2020-12-22 09:56:49,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:56:49,378 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:49,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:49,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2020-12-22 09:56:49,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:49,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625046420] [2020-12-22 09:56:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:49,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625046420] [2020-12-22 09:56:49,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:49,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:49,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610926199] [2020-12-22 09:56:49,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:49,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:49,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:49,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:49,461 INFO L87 Difference]: Start difference. First operand 1902 states and 3060 transitions. Second operand 3 states. [2020-12-22 09:56:49,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:49,535 INFO L93 Difference]: Finished difference Result 2574 states and 4094 transitions. [2020-12-22 09:56:49,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:49,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:56:49,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:49,549 INFO L225 Difference]: With dead ends: 2574 [2020-12-22 09:56:49,549 INFO L226 Difference]: Without dead ends: 2214 [2020-12-22 09:56:49,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:49,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2020-12-22 09:56:49,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2212. [2020-12-22 09:56:49,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2020-12-22 09:56:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3528 transitions. [2020-12-22 09:56:49,644 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3528 transitions. Word has length 66 [2020-12-22 09:56:49,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:49,645 INFO L481 AbstractCegarLoop]: Abstraction has 2212 states and 3528 transitions. [2020-12-22 09:56:49,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:49,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3528 transitions. [2020-12-22 09:56:49,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:56:49,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:49,647 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] [2020-12-22 09:56:49,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:56:49,647 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:49,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:49,648 INFO L82 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2020-12-22 09:56:49,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:49,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923599626] [2020-12-22 09:56:49,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:49,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923599626] [2020-12-22 09:56:49,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:49,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:49,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760568730] [2020-12-22 09:56:49,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:49,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:49,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:49,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:49,724 INFO L87 Difference]: Start difference. First operand 2212 states and 3528 transitions. Second operand 3 states. [2020-12-22 09:56:49,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:49,893 INFO L93 Difference]: Finished difference Result 3456 states and 5418 transitions. [2020-12-22 09:56:49,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:49,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:56:49,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:49,909 INFO L225 Difference]: With dead ends: 3456 [2020-12-22 09:56:49,910 INFO L226 Difference]: Without dead ends: 2786 [2020-12-22 09:56:49,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:49,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2020-12-22 09:56:50,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2784. [2020-12-22 09:56:50,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2784 states. [2020-12-22 09:56:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 4376 transitions. [2020-12-22 09:56:50,025 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 4376 transitions. Word has length 66 [2020-12-22 09:56:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:50,026 INFO L481 AbstractCegarLoop]: Abstraction has 2784 states and 4376 transitions. [2020-12-22 09:56:50,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 4376 transitions. [2020-12-22 09:56:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:56:50,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:50,027 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] [2020-12-22 09:56:50,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:56:50,027 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:50,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:50,028 INFO L82 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2020-12-22 09:56:50,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:50,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743567715] [2020-12-22 09:56:50,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:50,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743567715] [2020-12-22 09:56:50,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:50,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:50,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054520738] [2020-12-22 09:56:50,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:50,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:50,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:50,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:50,084 INFO L87 Difference]: Start difference. First operand 2784 states and 4376 transitions. Second operand 3 states. [2020-12-22 09:56:50,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:50,250 INFO L93 Difference]: Finished difference Result 5076 states and 7802 transitions. [2020-12-22 09:56:50,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:50,251 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:56:50,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:50,273 INFO L225 Difference]: With dead ends: 5076 [2020-12-22 09:56:50,273 INFO L226 Difference]: Without dead ends: 3834 [2020-12-22 09:56:50,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:50,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2020-12-22 09:56:50,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3832. [2020-12-22 09:56:50,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3832 states. [2020-12-22 09:56:50,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 5896 transitions. [2020-12-22 09:56:50,498 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 5896 transitions. Word has length 66 [2020-12-22 09:56:50,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:50,499 INFO L481 AbstractCegarLoop]: Abstraction has 3832 states and 5896 transitions. [2020-12-22 09:56:50,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:50,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 5896 transitions. [2020-12-22 09:56:50,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:56:50,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:50,506 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] [2020-12-22 09:56:50,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:56:50,507 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:50,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:50,508 INFO L82 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2020-12-22 09:56:50,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:50,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653688877] [2020-12-22 09:56:50,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:50,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653688877] [2020-12-22 09:56:50,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:50,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:56:50,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635147571] [2020-12-22 09:56:50,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:56:50,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:50,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:56:50,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:56:50,618 INFO L87 Difference]: Start difference. First operand 3832 states and 5896 transitions. Second operand 5 states. [2020-12-22 09:56:50,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:50,956 INFO L93 Difference]: Finished difference Result 5558 states and 8398 transitions. [2020-12-22 09:56:50,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:50,957 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:56:50,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:51,009 INFO L225 Difference]: With dead ends: 5558 [2020-12-22 09:56:51,009 INFO L226 Difference]: Without dead ends: 5556 [2020-12-22 09:56:51,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:56:51,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5556 states. [2020-12-22 09:56:51,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5556 to 3928. [2020-12-22 09:56:51,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2020-12-22 09:56:51,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 5976 transitions. [2020-12-22 09:56:51,272 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 5976 transitions. Word has length 67 [2020-12-22 09:56:51,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:51,272 INFO L481 AbstractCegarLoop]: Abstraction has 3928 states and 5976 transitions. [2020-12-22 09:56:51,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:56:51,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 5976 transitions. [2020-12-22 09:56:51,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:56:51,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:51,273 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] [2020-12-22 09:56:51,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:56:51,274 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:51,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:51,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2020-12-22 09:56:51,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:51,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003646330] [2020-12-22 09:56:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:51,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003646330] [2020-12-22 09:56:51,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:51,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:51,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954398750] [2020-12-22 09:56:51,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:51,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:51,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:51,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:51,343 INFO L87 Difference]: Start difference. First operand 3928 states and 5976 transitions. Second operand 3 states. [2020-12-22 09:56:51,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:51,605 INFO L93 Difference]: Finished difference Result 6367 states and 9566 transitions. [2020-12-22 09:56:51,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:51,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 09:56:51,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:51,621 INFO L225 Difference]: With dead ends: 6367 [2020-12-22 09:56:51,621 INFO L226 Difference]: Without dead ends: 5020 [2020-12-22 09:56:51,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:51,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5020 states. [2020-12-22 09:56:51,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5020 to 5018. [2020-12-22 09:56:51,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5018 states. [2020-12-22 09:56:51,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 7530 transitions. [2020-12-22 09:56:51,978 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 7530 transitions. Word has length 68 [2020-12-22 09:56:51,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:51,978 INFO L481 AbstractCegarLoop]: Abstraction has 5018 states and 7530 transitions. [2020-12-22 09:56:51,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:51,979 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 7530 transitions. [2020-12-22 09:56:51,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 09:56:51,981 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:51,982 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:51,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:56:51,982 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:51,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:51,983 INFO L82 PathProgramCache]: Analyzing trace with hash -2140199412, now seen corresponding path program 1 times [2020-12-22 09:56:51,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:51,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447641825] [2020-12-22 09:56:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:52,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447641825] [2020-12-22 09:56:52,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:52,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:52,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523463158] [2020-12-22 09:56:52,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:52,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:52,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:52,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:52,120 INFO L87 Difference]: Start difference. First operand 5018 states and 7530 transitions. Second operand 3 states. [2020-12-22 09:56:58,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:58,819 INFO L93 Difference]: Finished difference Result 8024 states and 12457 transitions. [2020-12-22 09:56:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:58,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-12-22 09:56:58,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:58,835 INFO L225 Difference]: With dead ends: 8024 [2020-12-22 09:56:58,835 INFO L226 Difference]: Without dead ends: 6520 [2020-12-22 09:56:58,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:58,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6520 states. [2020-12-22 09:56:59,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6520 to 6520. [2020-12-22 09:56:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6520 states. [2020-12-22 09:56:59,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6520 states to 6520 states and 9686 transitions. [2020-12-22 09:56:59,237 INFO L78 Accepts]: Start accepts. Automaton has 6520 states and 9686 transitions. Word has length 87 [2020-12-22 09:56:59,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:59,238 INFO L481 AbstractCegarLoop]: Abstraction has 6520 states and 9686 transitions. [2020-12-22 09:56:59,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:59,238 INFO L276 IsEmpty]: Start isEmpty. Operand 6520 states and 9686 transitions. [2020-12-22 09:56:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 09:56:59,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:59,241 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:59,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:56:59,241 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:59,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:59,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1102127345, now seen corresponding path program 1 times [2020-12-22 09:56:59,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:59,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166959398] [2020-12-22 09:56:59,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:59,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166959398] [2020-12-22 09:56:59,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:59,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:56:59,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506493495] [2020-12-22 09:56:59,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:56:59,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:59,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:56:59,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:56:59,420 INFO L87 Difference]: Start difference. First operand 6520 states and 9686 transitions. Second operand 5 states. [2020-12-22 09:57:07,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:07,295 INFO L93 Difference]: Finished difference Result 10294 states and 15350 transitions. [2020-12-22 09:57:07,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:57:07,296 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2020-12-22 09:57:07,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:07,311 INFO L225 Difference]: With dead ends: 10294 [2020-12-22 09:57:07,311 INFO L226 Difference]: Without dead ends: 7288 [2020-12-22 09:57:07,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:57:07,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7288 states. [2020-12-22 09:57:07,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7288 to 7271. [2020-12-22 09:57:07,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7271 states. [2020-12-22 09:57:07,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7271 states to 7271 states and 10443 transitions. [2020-12-22 09:57:07,650 INFO L78 Accepts]: Start accepts. Automaton has 7271 states and 10443 transitions. Word has length 90 [2020-12-22 09:57:07,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:07,650 INFO L481 AbstractCegarLoop]: Abstraction has 7271 states and 10443 transitions. [2020-12-22 09:57:07,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:57:07,650 INFO L276 IsEmpty]: Start isEmpty. Operand 7271 states and 10443 transitions. [2020-12-22 09:57:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:07,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:07,654 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:07,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:57:07,654 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:07,655 INFO L82 PathProgramCache]: Analyzing trace with hash 320828100, now seen corresponding path program 1 times [2020-12-22 09:57:07,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:07,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728247042] [2020-12-22 09:57:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:57:07,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728247042] [2020-12-22 09:57:07,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:07,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:07,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495153515] [2020-12-22 09:57:07,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:07,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:07,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:07,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:07,804 INFO L87 Difference]: Start difference. First operand 7271 states and 10443 transitions. Second operand 7 states. [2020-12-22 09:57:09,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:09,095 INFO L93 Difference]: Finished difference Result 25347 states and 36545 transitions. [2020-12-22 09:57:09,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:09,096 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:09,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:09,138 INFO L225 Difference]: With dead ends: 25347 [2020-12-22 09:57:09,138 INFO L226 Difference]: Without dead ends: 21873 [2020-12-22 09:57:09,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:09,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21873 states. [2020-12-22 09:57:09,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21873 to 10743. [2020-12-22 09:57:09,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10743 states. [2020-12-22 09:57:09,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10743 states to 10743 states and 15419 transitions. [2020-12-22 09:57:09,789 INFO L78 Accepts]: Start accepts. Automaton has 10743 states and 15419 transitions. Word has length 94 [2020-12-22 09:57:09,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:09,789 INFO L481 AbstractCegarLoop]: Abstraction has 10743 states and 15419 transitions. [2020-12-22 09:57:09,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:09,789 INFO L276 IsEmpty]: Start isEmpty. Operand 10743 states and 15419 transitions. [2020-12-22 09:57:09,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:09,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:09,793 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:09,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:57:09,794 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:09,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:09,794 INFO L82 PathProgramCache]: Analyzing trace with hash 350350318, now seen corresponding path program 1 times [2020-12-22 09:57:09,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:09,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520704171] [2020-12-22 09:57:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:57:09,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520704171] [2020-12-22 09:57:09,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:09,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:09,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554352911] [2020-12-22 09:57:09,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:09,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:09,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:09,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:09,919 INFO L87 Difference]: Start difference. First operand 10743 states and 15419 transitions. Second operand 7 states. [2020-12-22 09:57:11,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:11,392 INFO L93 Difference]: Finished difference Result 28819 states and 41521 transitions. [2020-12-22 09:57:11,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:11,392 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:11,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:11,430 INFO L225 Difference]: With dead ends: 28819 [2020-12-22 09:57:11,430 INFO L226 Difference]: Without dead ends: 25345 [2020-12-22 09:57:11,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:11,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25345 states. [2020-12-22 09:57:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25345 to 15959. [2020-12-22 09:57:12,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15959 states. [2020-12-22 09:57:12,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15959 states to 15959 states and 22843 transitions. [2020-12-22 09:57:12,535 INFO L78 Accepts]: Start accepts. Automaton has 15959 states and 22843 transitions. Word has length 94 [2020-12-22 09:57:12,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:12,535 INFO L481 AbstractCegarLoop]: Abstraction has 15959 states and 22843 transitions. [2020-12-22 09:57:12,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:12,535 INFO L276 IsEmpty]: Start isEmpty. Operand 15959 states and 22843 transitions. [2020-12-22 09:57:12,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:12,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:12,539 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:12,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:57:12,540 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:12,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:12,541 INFO L82 PathProgramCache]: Analyzing trace with hash 624038030, now seen corresponding path program 1 times [2020-12-22 09:57:12,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:12,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561501540] [2020-12-22 09:57:12,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:57:12,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561501540] [2020-12-22 09:57:12,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:12,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:12,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638472274] [2020-12-22 09:57:12,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:12,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:12,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:12,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:12,657 INFO L87 Difference]: Start difference. First operand 15959 states and 22843 transitions. Second operand 7 states. [2020-12-22 09:57:14,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:14,062 INFO L93 Difference]: Finished difference Result 32291 states and 46497 transitions. [2020-12-22 09:57:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:14,062 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:14,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:14,106 INFO L225 Difference]: With dead ends: 32291 [2020-12-22 09:57:14,106 INFO L226 Difference]: Without dead ends: 28817 [2020-12-22 09:57:14,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:14,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28817 states. [2020-12-22 09:57:15,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28817 to 19431. [2020-12-22 09:57:15,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19431 states. [2020-12-22 09:57:15,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19431 states to 19431 states and 27819 transitions. [2020-12-22 09:57:15,386 INFO L78 Accepts]: Start accepts. Automaton has 19431 states and 27819 transitions. Word has length 94 [2020-12-22 09:57:15,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:15,387 INFO L481 AbstractCegarLoop]: Abstraction has 19431 states and 27819 transitions. [2020-12-22 09:57:15,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:15,387 INFO L276 IsEmpty]: Start isEmpty. Operand 19431 states and 27819 transitions. [2020-12-22 09:57:15,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:15,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:15,392 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:15,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:57:15,392 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:15,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:15,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1851857618, now seen corresponding path program 1 times [2020-12-22 09:57:15,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:15,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893428298] [2020-12-22 09:57:15,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:57:15,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893428298] [2020-12-22 09:57:15,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:15,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:15,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12847134] [2020-12-22 09:57:15,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:15,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:15,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:15,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:15,619 INFO L87 Difference]: Start difference. First operand 19431 states and 27819 transitions. Second operand 7 states. [2020-12-22 09:57:17,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:17,248 INFO L93 Difference]: Finished difference Result 35763 states and 51473 transitions. [2020-12-22 09:57:17,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:17,248 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:17,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:17,287 INFO L225 Difference]: With dead ends: 35763 [2020-12-22 09:57:17,287 INFO L226 Difference]: Without dead ends: 32289 [2020-12-22 09:57:17,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:17,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32289 states. [2020-12-22 09:57:18,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32289 to 22903. [2020-12-22 09:57:18,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22903 states. [2020-12-22 09:57:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22903 states to 22903 states and 32795 transitions. [2020-12-22 09:57:18,618 INFO L78 Accepts]: Start accepts. Automaton has 22903 states and 32795 transitions. Word has length 94 [2020-12-22 09:57:18,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:18,619 INFO L481 AbstractCegarLoop]: Abstraction has 22903 states and 32795 transitions. [2020-12-22 09:57:18,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 22903 states and 32795 transitions. [2020-12-22 09:57:18,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:57:18,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:18,625 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:18,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:57:18,625 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:18,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:18,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2023924156, now seen corresponding path program 1 times [2020-12-22 09:57:18,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:18,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339819404] [2020-12-22 09:57:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:18,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339819404] [2020-12-22 09:57:18,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:18,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:18,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264794135] [2020-12-22 09:57:18,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:18,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:18,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:18,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:18,699 INFO L87 Difference]: Start difference. First operand 22903 states and 32795 transitions. Second operand 3 states. [2020-12-22 09:57:19,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:19,485 INFO L93 Difference]: Finished difference Result 36312 states and 52192 transitions. [2020-12-22 09:57:19,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:19,486 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 09:57:19,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:19,506 INFO L225 Difference]: With dead ends: 36312 [2020-12-22 09:57:19,506 INFO L226 Difference]: Without dead ends: 17206 [2020-12-22 09:57:19,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:19,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17206 states. [2020-12-22 09:57:20,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17206 to 17204. [2020-12-22 09:57:20,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17204 states. [2020-12-22 09:57:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17204 states to 17204 states and 24637 transitions. [2020-12-22 09:57:20,607 INFO L78 Accepts]: Start accepts. Automaton has 17204 states and 24637 transitions. Word has length 96 [2020-12-22 09:57:20,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:20,607 INFO L481 AbstractCegarLoop]: Abstraction has 17204 states and 24637 transitions. [2020-12-22 09:57:20,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:20,607 INFO L276 IsEmpty]: Start isEmpty. Operand 17204 states and 24637 transitions. [2020-12-22 09:57:20,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:57:20,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:20,613 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:20,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:57:20,613 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:20,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:20,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1980328951, now seen corresponding path program 1 times [2020-12-22 09:57:20,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:20,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100569629] [2020-12-22 09:57:20,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:57:20,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100569629] [2020-12-22 09:57:20,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:20,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:20,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791965847] [2020-12-22 09:57:20,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:20,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:20,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:20,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:20,747 INFO L87 Difference]: Start difference. First operand 17204 states and 24637 transitions. Second operand 7 states. [2020-12-22 09:57:22,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:22,205 INFO L93 Difference]: Finished difference Result 29376 states and 42243 transitions. [2020-12-22 09:57:22,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:22,206 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-12-22 09:57:22,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:22,235 INFO L225 Difference]: With dead ends: 29376 [2020-12-22 09:57:22,236 INFO L226 Difference]: Without dead ends: 26942 [2020-12-22 09:57:22,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:22,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26942 states. [2020-12-22 09:57:23,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26942 to 19636. [2020-12-22 09:57:23,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19636 states. [2020-12-22 09:57:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19636 states to 19636 states and 28125 transitions. [2020-12-22 09:57:23,286 INFO L78 Accepts]: Start accepts. Automaton has 19636 states and 28125 transitions. Word has length 96 [2020-12-22 09:57:23,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:23,287 INFO L481 AbstractCegarLoop]: Abstraction has 19636 states and 28125 transitions. [2020-12-22 09:57:23,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:23,287 INFO L276 IsEmpty]: Start isEmpty. Operand 19636 states and 28125 transitions. [2020-12-22 09:57:23,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:23,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:23,292 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:23,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:57:23,292 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:23,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:23,293 INFO L82 PathProgramCache]: Analyzing trace with hash 28168523, now seen corresponding path program 1 times [2020-12-22 09:57:23,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:23,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925260891] [2020-12-22 09:57:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:23,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925260891] [2020-12-22 09:57:23,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:23,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:23,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822730245] [2020-12-22 09:57:23,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:23,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:23,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:23,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:23,453 INFO L87 Difference]: Start difference. First operand 19636 states and 28125 transitions. Second operand 3 states. [2020-12-22 09:57:24,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:24,328 INFO L93 Difference]: Finished difference Result 27544 states and 39463 transitions. [2020-12-22 09:57:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:24,329 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:57:24,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:24,348 INFO L225 Difference]: With dead ends: 27544 [2020-12-22 09:57:24,348 INFO L226 Difference]: Without dead ends: 11734 [2020-12-22 09:57:24,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:24,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11734 states. [2020-12-22 09:57:24,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11734 to 11732. [2020-12-22 09:57:24,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11732 states. [2020-12-22 09:57:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11732 states to 11732 states and 16685 transitions. [2020-12-22 09:57:24,952 INFO L78 Accepts]: Start accepts. Automaton has 11732 states and 16685 transitions. Word has length 97 [2020-12-22 09:57:24,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:24,953 INFO L481 AbstractCegarLoop]: Abstraction has 11732 states and 16685 transitions. [2020-12-22 09:57:24,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 11732 states and 16685 transitions. [2020-12-22 09:57:24,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:24,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:24,956 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:24,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:57:24,956 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:24,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1887443071, now seen corresponding path program 1 times [2020-12-22 09:57:24,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:24,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535103610] [2020-12-22 09:57:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:25,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535103610] [2020-12-22 09:57:25,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:25,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:25,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470321746] [2020-12-22 09:57:25,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:25,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:25,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:25,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:25,020 INFO L87 Difference]: Start difference. First operand 11732 states and 16685 transitions. Second operand 3 states. [2020-12-22 09:57:25,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:25,540 INFO L93 Difference]: Finished difference Result 15688 states and 22303 transitions. [2020-12-22 09:57:25,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:25,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:57:25,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:25,551 INFO L225 Difference]: With dead ends: 15688 [2020-12-22 09:57:25,551 INFO L226 Difference]: Without dead ends: 7782 [2020-12-22 09:57:25,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:25,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7782 states. [2020-12-22 09:57:25,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7782 to 7780. [2020-12-22 09:57:25,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7780 states. [2020-12-22 09:57:25,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7780 states to 7780 states and 11017 transitions. [2020-12-22 09:57:25,900 INFO L78 Accepts]: Start accepts. Automaton has 7780 states and 11017 transitions. Word has length 97 [2020-12-22 09:57:25,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:25,900 INFO L481 AbstractCegarLoop]: Abstraction has 7780 states and 11017 transitions. [2020-12-22 09:57:25,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:25,900 INFO L276 IsEmpty]: Start isEmpty. Operand 7780 states and 11017 transitions. [2020-12-22 09:57:25,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:25,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:25,902 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:25,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:57:25,902 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:25,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:25,903 INFO L82 PathProgramCache]: Analyzing trace with hash -300840777, now seen corresponding path program 1 times [2020-12-22 09:57:25,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:25,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847966442] [2020-12-22 09:57:25,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:25,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847966442] [2020-12-22 09:57:25,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:25,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:25,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801582542] [2020-12-22 09:57:25,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:25,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:25,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:25,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:25,963 INFO L87 Difference]: Start difference. First operand 7780 states and 11017 transitions. Second operand 3 states. [2020-12-22 09:57:26,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:26,132 INFO L93 Difference]: Finished difference Result 9760 states and 13801 transitions. [2020-12-22 09:57:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:26,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:57:26,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:26,140 INFO L225 Difference]: With dead ends: 9760 [2020-12-22 09:57:26,141 INFO L226 Difference]: Without dead ends: 5806 [2020-12-22 09:57:26,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:26,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5806 states. [2020-12-22 09:57:26,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5806 to 5804. [2020-12-22 09:57:26,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5804 states. [2020-12-22 09:57:26,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5804 states to 5804 states and 8209 transitions. [2020-12-22 09:57:26,322 INFO L78 Accepts]: Start accepts. Automaton has 5804 states and 8209 transitions. Word has length 97 [2020-12-22 09:57:26,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:26,323 INFO L481 AbstractCegarLoop]: Abstraction has 5804 states and 8209 transitions. [2020-12-22 09:57:26,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:26,323 INFO L276 IsEmpty]: Start isEmpty. Operand 5804 states and 8209 transitions. [2020-12-22 09:57:26,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:26,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:26,324 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:26,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:57:26,325 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:26,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:26,325 INFO L82 PathProgramCache]: Analyzing trace with hash -387959571, now seen corresponding path program 1 times [2020-12-22 09:57:26,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:26,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623492021] [2020-12-22 09:57:26,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:26,615 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-12-22 09:57:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:26,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623492021] [2020-12-22 09:57:26,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039923059] [2020-12-22 09:57:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:57:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:26,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:57:26,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:57:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:57:27,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:57:27,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 09:57:27,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820451886] [2020-12-22 09:57:27,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 09:57:27,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:27,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 09:57:27,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 09:57:27,429 INFO L87 Difference]: Start difference. First operand 5804 states and 8209 transitions. Second operand 16 states. [2020-12-22 09:57:29,453 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 09:57:29,666 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 09:57:31,345 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-12-22 09:57:31,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:31,884 INFO L93 Difference]: Finished difference Result 16875 states and 23228 transitions. [2020-12-22 09:57:31,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 09:57:31,885 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-12-22 09:57:31,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:31,939 INFO L225 Difference]: With dead ends: 16875 [2020-12-22 09:57:31,939 INFO L226 Difference]: Without dead ends: 14897 [2020-12-22 09:57:31,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=491, Invalid=2161, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 09:57:31,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14897 states. [2020-12-22 09:57:32,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14897 to 11526. [2020-12-22 09:57:32,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11526 states. [2020-12-22 09:57:32,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11526 states to 11526 states and 15771 transitions. [2020-12-22 09:57:32,790 INFO L78 Accepts]: Start accepts. Automaton has 11526 states and 15771 transitions. Word has length 97 [2020-12-22 09:57:32,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:32,790 INFO L481 AbstractCegarLoop]: Abstraction has 11526 states and 15771 transitions. [2020-12-22 09:57:32,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 09:57:32,791 INFO L276 IsEmpty]: Start isEmpty. Operand 11526 states and 15771 transitions. [2020-12-22 09:57:32,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:57:32,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:32,794 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] [2020-12-22 09:57:33,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 09:57:33,008 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:33,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:33,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1231715697, now seen corresponding path program 1 times [2020-12-22 09:57:33,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:33,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678969119] [2020-12-22 09:57:33,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:33,279 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-12-22 09:57:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:33,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678969119] [2020-12-22 09:57:33,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898359888] [2020-12-22 09:57:33,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:57:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:33,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:57:33,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:57:33,867 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:57:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:34,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:57:34,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:57:34,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333969860] [2020-12-22 09:57:34,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:57:34,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:34,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:57:34,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:57:34,274 INFO L87 Difference]: Start difference. First operand 11526 states and 15771 transitions. Second operand 22 states. [2020-12-22 09:57:34,402 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-12-22 09:57:34,525 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-12-22 09:57:36,874 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-12-22 09:57:39,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:39,650 INFO L93 Difference]: Finished difference Result 42327 states and 56837 transitions. [2020-12-22 09:57:39,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:57:39,650 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2020-12-22 09:57:39,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:39,694 INFO L225 Difference]: With dead ends: 42327 [2020-12-22 09:57:39,694 INFO L226 Difference]: Without dead ends: 35824 [2020-12-22 09:57:39,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 09:57:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35824 states. [2020-12-22 09:57:41,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35824 to 24029. [2020-12-22 09:57:41,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24029 states. [2020-12-22 09:57:42,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24029 states to 24029 states and 32310 transitions. [2020-12-22 09:57:42,018 INFO L78 Accepts]: Start accepts. Automaton has 24029 states and 32310 transitions. Word has length 98 [2020-12-22 09:57:42,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:42,018 INFO L481 AbstractCegarLoop]: Abstraction has 24029 states and 32310 transitions. [2020-12-22 09:57:42,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:57:42,018 INFO L276 IsEmpty]: Start isEmpty. Operand 24029 states and 32310 transitions. [2020-12-22 09:57:42,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:57:42,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:42,021 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] [2020-12-22 09:57:42,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 09:57:42,225 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:42,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:42,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1198087855, now seen corresponding path program 1 times [2020-12-22 09:57:42,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:42,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073007811] [2020-12-22 09:57:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:42,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073007811] [2020-12-22 09:57:42,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23844998] [2020-12-22 09:57:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:57:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:42,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:57:42,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:57:42,852 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:57:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:43,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:57:43,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:57:43,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704894293] [2020-12-22 09:57:43,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:57:43,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:43,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:57:43,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:57:43,208 INFO L87 Difference]: Start difference. First operand 24029 states and 32310 transitions. Second operand 17 states. [2020-12-22 09:57:44,178 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:57:46,371 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:57:46,873 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:57:47,640 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:57:52,355 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:58:11,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:11,166 INFO L93 Difference]: Finished difference Result 218584 states and 290120 transitions. [2020-12-22 09:58:11,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 09:58:11,167 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 98 [2020-12-22 09:58:11,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:11,687 INFO L225 Difference]: With dead ends: 218584 [2020-12-22 09:58:11,687 INFO L226 Difference]: Without dead ends: 199027 [2020-12-22 09:58:11,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1236, Invalid=6596, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 09:58:11,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199027 states. [2020-12-22 09:58:24,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199027 to 114302. [2020-12-22 09:58:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114302 states. [2020-12-22 09:58:24,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114302 states to 114302 states and 149693 transitions. [2020-12-22 09:58:24,753 INFO L78 Accepts]: Start accepts. Automaton has 114302 states and 149693 transitions. Word has length 98 [2020-12-22 09:58:24,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:24,753 INFO L481 AbstractCegarLoop]: Abstraction has 114302 states and 149693 transitions. [2020-12-22 09:58:24,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:58:24,753 INFO L276 IsEmpty]: Start isEmpty. Operand 114302 states and 149693 transitions. [2020-12-22 09:58:24,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:58:24,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:24,757 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] [2020-12-22 09:58:24,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 09:58:25,164 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:25,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:25,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2130421773, now seen corresponding path program 1 times [2020-12-22 09:58:25,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:25,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606004495] [2020-12-22 09:58:25,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:58:25,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606004495] [2020-12-22 09:58:25,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:25,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:58:25,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129979866] [2020-12-22 09:58:25,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:58:25,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:25,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:58:25,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:58:25,310 INFO L87 Difference]: Start difference. First operand 114302 states and 149693 transitions. Second operand 6 states. [2020-12-22 09:58:36,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:36,049 INFO L93 Difference]: Finished difference Result 214747 states and 281474 transitions. [2020-12-22 09:58:36,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:58:36,050 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:58:36,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:36,178 INFO L225 Difference]: With dead ends: 214747 [2020-12-22 09:58:36,178 INFO L226 Difference]: Without dead ends: 104443 [2020-12-22 09:58:36,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:58:36,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104443 states. [2020-12-22 09:58:47,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104443 to 104443. [2020-12-22 09:58:47,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104443 states. [2020-12-22 09:58:47,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104443 states to 104443 states and 135932 transitions. [2020-12-22 09:58:47,228 INFO L78 Accepts]: Start accepts. Automaton has 104443 states and 135932 transitions. Word has length 98 [2020-12-22 09:58:47,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:47,228 INFO L481 AbstractCegarLoop]: Abstraction has 104443 states and 135932 transitions. [2020-12-22 09:58:47,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:58:47,228 INFO L276 IsEmpty]: Start isEmpty. Operand 104443 states and 135932 transitions. [2020-12-22 09:58:47,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:58:47,231 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:47,231 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] [2020-12-22 09:58:47,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 09:58:47,232 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:47,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:47,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1745709901, now seen corresponding path program 1 times [2020-12-22 09:58:47,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:47,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297378459] [2020-12-22 09:58:47,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:58:47,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297378459] [2020-12-22 09:58:47,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:47,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:58:47,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171077363] [2020-12-22 09:58:47,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:58:47,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:47,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:58:47,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:58:47,342 INFO L87 Difference]: Start difference. First operand 104443 states and 135932 transitions. Second operand 6 states. [2020-12-22 09:58:56,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:56,111 INFO L93 Difference]: Finished difference Result 177981 states and 231383 transitions. [2020-12-22 09:58:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:58:56,111 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:58:56,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:56,193 INFO L225 Difference]: With dead ends: 177981 [2020-12-22 09:58:56,193 INFO L226 Difference]: Without dead ends: 77702 [2020-12-22 09:58:56,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:58:56,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77702 states. [2020-12-22 09:59:04,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77702 to 77702. [2020-12-22 09:59:04,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77702 states. [2020-12-22 09:59:04,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77702 states to 77702 states and 99860 transitions. [2020-12-22 09:59:04,793 INFO L78 Accepts]: Start accepts. Automaton has 77702 states and 99860 transitions. Word has length 98 [2020-12-22 09:59:04,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:04,793 INFO L481 AbstractCegarLoop]: Abstraction has 77702 states and 99860 transitions. [2020-12-22 09:59:04,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:04,794 INFO L276 IsEmpty]: Start isEmpty. Operand 77702 states and 99860 transitions. [2020-12-22 09:59:04,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:59:04,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:04,797 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] [2020-12-22 09:59:04,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:59:04,797 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:04,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:04,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1530628851, now seen corresponding path program 1 times [2020-12-22 09:59:04,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:04,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138379936] [2020-12-22 09:59:04,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 09:59:04,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138379936] [2020-12-22 09:59:04,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:04,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:04,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458410274] [2020-12-22 09:59:04,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:59:04,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:04,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:59:04,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:59:04,882 INFO L87 Difference]: Start difference. First operand 77702 states and 99860 transitions. Second operand 6 states. [2020-12-22 09:59:11,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:11,731 INFO L93 Difference]: Finished difference Result 133492 states and 171524 transitions. [2020-12-22 09:59:11,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:59:11,732 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:59:11,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:11,935 INFO L225 Difference]: With dead ends: 133492 [2020-12-22 09:59:11,936 INFO L226 Difference]: Without dead ends: 59672 [2020-12-22 09:59:11,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:59:11,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59672 states. [2020-12-22 09:59:18,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59672 to 59672. [2020-12-22 09:59:18,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59672 states. [2020-12-22 09:59:18,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59672 states to 59672 states and 76554 transitions. [2020-12-22 09:59:18,537 INFO L78 Accepts]: Start accepts. Automaton has 59672 states and 76554 transitions. Word has length 98 [2020-12-22 09:59:18,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:18,537 INFO L481 AbstractCegarLoop]: Abstraction has 59672 states and 76554 transitions. [2020-12-22 09:59:18,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:18,537 INFO L276 IsEmpty]: Start isEmpty. Operand 59672 states and 76554 transitions. [2020-12-22 09:59:18,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 09:59:18,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:18,540 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] [2020-12-22 09:59:18,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 09:59:18,540 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:18,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:18,541 INFO L82 PathProgramCache]: Analyzing trace with hash -328972562, now seen corresponding path program 1 times [2020-12-22 09:59:18,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:18,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207669349] [2020-12-22 09:59:18,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:59:18,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207669349] [2020-12-22 09:59:18,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:18,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:18,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940306158] [2020-12-22 09:59:18,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:59:18,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:18,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:59:18,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:59:18,627 INFO L87 Difference]: Start difference. First operand 59672 states and 76554 transitions. Second operand 6 states. [2020-12-22 09:59:24,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:24,447 INFO L93 Difference]: Finished difference Result 102726 states and 131457 transitions. [2020-12-22 09:59:24,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:59:24,448 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-12-22 09:59:24,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:24,494 INFO L225 Difference]: With dead ends: 102726 [2020-12-22 09:59:24,494 INFO L226 Difference]: Without dead ends: 46938 [2020-12-22 09:59:24,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:59:24,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46938 states. [2020-12-22 09:59:29,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46938 to 46938. [2020-12-22 09:59:29,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46938 states. [2020-12-22 09:59:29,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46938 states to 46938 states and 59797 transitions. [2020-12-22 09:59:29,818 INFO L78 Accepts]: Start accepts. Automaton has 46938 states and 59797 transitions. Word has length 99 [2020-12-22 09:59:29,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:29,819 INFO L481 AbstractCegarLoop]: Abstraction has 46938 states and 59797 transitions. [2020-12-22 09:59:29,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 46938 states and 59797 transitions. [2020-12-22 09:59:29,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 09:59:29,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:29,821 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] [2020-12-22 09:59:29,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 09:59:29,821 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:29,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:29,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1888515992, now seen corresponding path program 1 times [2020-12-22 09:59:29,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:29,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502409768] [2020-12-22 09:59:29,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:30,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502409768] [2020-12-22 09:59:30,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483409935] [2020-12-22 09:59:30,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:59:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:30,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:59:30,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:59:30,467 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-22 09:59:30,649 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:59:30,963 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2020-12-22 09:59:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:31,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:59:31,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2020-12-22 09:59:31,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429681083] [2020-12-22 09:59:31,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 09:59:31,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:31,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 09:59:31,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-12-22 09:59:31,595 INFO L87 Difference]: Start difference. First operand 46938 states and 59797 transitions. Second operand 20 states. [2020-12-22 09:59:32,565 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-12-22 09:59:33,092 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-12-22 09:59:33,870 WARN L197 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 110 [2020-12-22 09:59:34,622 WARN L197 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 116 [2020-12-22 09:59:35,375 WARN L197 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:59:36,089 WARN L197 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:59:36,852 WARN L197 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 09:59:37,403 WARN L197 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-12-22 09:59:38,145 WARN L197 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 09:59:38,769 WARN L197 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2020-12-22 09:59:39,533 WARN L197 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 09:59:40,383 WARN L197 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 09:59:41,305 WARN L197 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 09:59:42,053 WARN L197 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 09:59:42,720 WARN L197 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 09:59:43,718 WARN L197 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:59:47,477 WARN L197 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 09:59:48,541 WARN L197 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 128 [2020-12-22 09:59:49,419 WARN L197 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 09:59:49,907 WARN L197 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 09:59:51,038 WARN L197 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 09:59:51,543 WARN L197 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 09:59:52,078 WARN L197 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 09:59:52,669 WARN L197 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:59:53,322 WARN L197 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-12-22 09:59:53,776 WARN L197 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:59:54,776 WARN L197 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 119 [2020-12-22 09:59:55,793 WARN L197 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 09:59:56,456 WARN L197 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-12-22 09:59:56,978 WARN L197 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 09:59:58,287 WARN L197 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:59:58,858 WARN L197 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 09:59:59,935 WARN L197 SmtUtils]: Spent 941.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:00:00,439 WARN L197 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 10:00:00,849 WARN L197 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:00:04,773 WARN L197 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-12-22 10:00:06,773 WARN L197 SmtUtils]: Spent 979.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 117 [2020-12-22 10:00:08,067 WARN L197 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 10:00:08,738 WARN L197 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:00:09,395 WARN L197 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 10:00:10,391 WARN L197 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-12-22 10:00:11,011 WARN L197 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:00:11,792 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 10:00:12,219 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-12-22 10:00:12,974 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 10:00:13,362 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 80