/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:02:47,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:02:47,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:02:47,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:02:47,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:02:47,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:02:47,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:02:47,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:02:47,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:02:47,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:02:47,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:02:47,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:02:47,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:02:47,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:02:47,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:02:47,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:02:47,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:02:47,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:02:47,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:02:47,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:02:47,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:02:47,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:02:47,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:02:47,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:02:47,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:02:47,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:02:47,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:02:47,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:02:47,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:02:47,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:02:47,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:02:47,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:02:47,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:02:47,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:02:47,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:02:47,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:02:47,471 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:02:47,497 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:02:47,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:02:47,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:02:47,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:02:47,499 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:02:47,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:02:47,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:02:47,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:02:47,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:02:47,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:02:47,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:02:47,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:02:47,501 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:02:47,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:02:47,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:02:47,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:02:47,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:02:47,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:02:47,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:02:47,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:02:47,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:02:47,502 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:02:47,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:02:47,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:02:47,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:02:47,503 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:02:47,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:02:47,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:02:47,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:02:47,878 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:02:47,879 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:02:47,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 09:02:47,972 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/337c501bd/4532dc840282442e8ad32bd15bc09023/FLAGb2a8048e7 [2020-12-22 09:02:48,681 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:02:48,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 09:02:48,701 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/337c501bd/4532dc840282442e8ad32bd15bc09023/FLAGb2a8048e7 [2020-12-22 09:02:48,964 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/337c501bd/4532dc840282442e8ad32bd15bc09023 [2020-12-22 09:02:48,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:02:48,976 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:02:48,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:02:48,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:02:48,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:02:48,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:02:48" (1/1) ... [2020-12-22 09:02:48,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e14b840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:02:48, skipping insertion in model container [2020-12-22 09:02:48,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:02:48" (1/1) ... [2020-12-22 09:02:48,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:02:49,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:02:49,279 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7402,7415] [2020-12-22 09:02:49,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:02:49,334 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:02:49,398 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7402,7415] [2020-12-22 09:02:49,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:02:49,451 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:02:49,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:02:49 WrapperNode [2020-12-22 09:02:49,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:02:49,453 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:02:49,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:02:49,453 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:02:49,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:02:49" (1/1) ... [2020-12-22 09:02:49,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:02:49" (1/1) ... [2020-12-22 09:02:49,538 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:02:49,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:02:49,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:02:49,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:02:49,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:02:49" (1/1) ... [2020-12-22 09:02:49,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:02:49" (1/1) ... [2020-12-22 09:02:49,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:02:49" (1/1) ... [2020-12-22 09:02:49,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:02:49" (1/1) ... [2020-12-22 09:02:49,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:02:49" (1/1) ... [2020-12-22 09:02:49,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:02:49" (1/1) ... [2020-12-22 09:02:49,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:02:49" (1/1) ... [2020-12-22 09:02:49,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:02:49,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:02:49,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:02:49,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:02:49,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:02:49" (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 09:02:49,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:02:49,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:02:49,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:02:49,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:02:50,762 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:02:50,763 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:02:50,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:02:50 BoogieIcfgContainer [2020-12-22 09:02:50,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:02:50,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:02:50,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:02:50,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:02:50,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:02:48" (1/3) ... [2020-12-22 09:02:50,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f30d75a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:02:50, skipping insertion in model container [2020-12-22 09:02:50,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:02:49" (2/3) ... [2020-12-22 09:02:50,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f30d75a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:02:50, skipping insertion in model container [2020-12-22 09:02:50,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:02:50" (3/3) ... [2020-12-22 09:02:50,774 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 09:02:50,780 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:02:50,785 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:02:50,804 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:02:50,833 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:02:50,833 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:02:50,833 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:02:50,834 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:02:50,834 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:02:50,834 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:02:50,834 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:02:50,834 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:02:50,853 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states. [2020-12-22 09:02:50,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 09:02:50,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:50,865 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] [2020-12-22 09:02:50,865 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:50,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:50,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1468963440, now seen corresponding path program 1 times [2020-12-22 09:02:50,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:50,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763835445] [2020-12-22 09:02:50,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:51,422 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 09:02:51,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763835445] [2020-12-22 09:02:51,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:51,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:02:51,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064669858] [2020-12-22 09:02:51,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:02:51,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:51,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:02:51,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:02:51,448 INFO L87 Difference]: Start difference. First operand 149 states. Second operand 3 states. [2020-12-22 09:02:51,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:51,573 INFO L93 Difference]: Finished difference Result 323 states and 547 transitions. [2020-12-22 09:02:51,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:02:51,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 09:02:51,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:51,593 INFO L225 Difference]: With dead ends: 323 [2020-12-22 09:02:51,593 INFO L226 Difference]: Without dead ends: 225 [2020-12-22 09:02:51,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 09:02:51,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-22 09:02:51,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2020-12-22 09:02:51,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-22 09:02:51,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 349 transitions. [2020-12-22 09:02:51,705 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 349 transitions. Word has length 62 [2020-12-22 09:02:51,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:51,706 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 349 transitions. [2020-12-22 09:02:51,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:02:51,706 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 349 transitions. [2020-12-22 09:02:51,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:02:51,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:51,711 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 09:02:51,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:02:51,711 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:51,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:51,712 INFO L82 PathProgramCache]: Analyzing trace with hash -240910223, now seen corresponding path program 1 times [2020-12-22 09:02:51,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:51,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105576925] [2020-12-22 09:02:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:51,895 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 09:02:51,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105576925] [2020-12-22 09:02:51,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:51,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:02:51,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084116794] [2020-12-22 09:02:51,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:02:51,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:51,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:02:51,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:02:51,900 INFO L87 Difference]: Start difference. First operand 223 states and 349 transitions. Second operand 3 states. [2020-12-22 09:02:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:51,948 INFO L93 Difference]: Finished difference Result 539 states and 869 transitions. [2020-12-22 09:02:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:02:51,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:02:51,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:51,953 INFO L225 Difference]: With dead ends: 539 [2020-12-22 09:02:51,953 INFO L226 Difference]: Without dead ends: 373 [2020-12-22 09:02:51,955 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 09:02:51,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-12-22 09:02:52,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 371. [2020-12-22 09:02:52,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-12-22 09:02:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 592 transitions. [2020-12-22 09:02:52,012 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 592 transitions. Word has length 64 [2020-12-22 09:02:52,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:52,012 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 592 transitions. [2020-12-22 09:02:52,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:02:52,012 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 592 transitions. [2020-12-22 09:02:52,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:02:52,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:52,019 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 09:02:52,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:02:52,021 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:52,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:52,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1851209774, now seen corresponding path program 1 times [2020-12-22 09:02:52,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:52,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488161197] [2020-12-22 09:02:52,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:52,142 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 09:02:52,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488161197] [2020-12-22 09:02:52,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:52,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:02:52,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158276820] [2020-12-22 09:02:52,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:02:52,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:52,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:02:52,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:02:52,145 INFO L87 Difference]: Start difference. First operand 371 states and 592 transitions. Second operand 3 states. [2020-12-22 09:02:52,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:52,209 INFO L93 Difference]: Finished difference Result 967 states and 1570 transitions. [2020-12-22 09:02:52,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:02:52,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:02:52,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:52,217 INFO L225 Difference]: With dead ends: 967 [2020-12-22 09:02:52,218 INFO L226 Difference]: Without dead ends: 653 [2020-12-22 09:02:52,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 09:02:52,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2020-12-22 09:02:52,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 651. [2020-12-22 09:02:52,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2020-12-22 09:02:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1048 transitions. [2020-12-22 09:02:52,269 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1048 transitions. Word has length 66 [2020-12-22 09:02:52,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:52,276 INFO L481 AbstractCegarLoop]: Abstraction has 651 states and 1048 transitions. [2020-12-22 09:02:52,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:02:52,276 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1048 transitions. [2020-12-22 09:02:52,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:02:52,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:52,284 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 09:02:52,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:02:52,284 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:52,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:52,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1666116403, now seen corresponding path program 1 times [2020-12-22 09:02:52,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:52,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886016453] [2020-12-22 09:02:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:52,438 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 09:02:52,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886016453] [2020-12-22 09:02:52,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:52,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:02:52,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138781376] [2020-12-22 09:02:52,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:02:52,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:52,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:02:52,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:02:52,441 INFO L87 Difference]: Start difference. First operand 651 states and 1048 transitions. Second operand 5 states. [2020-12-22 09:02:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:52,703 INFO L93 Difference]: Finished difference Result 2807 states and 4618 transitions. [2020-12-22 09:02:52,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:02:52,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-12-22 09:02:52,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:52,717 INFO L225 Difference]: With dead ends: 2807 [2020-12-22 09:02:52,717 INFO L226 Difference]: Without dead ends: 2213 [2020-12-22 09:02:52,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:02:52,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2020-12-22 09:02:52,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 1170. [2020-12-22 09:02:52,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1170 states. [2020-12-22 09:02:52,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1898 transitions. [2020-12-22 09:02:52,802 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1898 transitions. Word has length 68 [2020-12-22 09:02:52,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:52,803 INFO L481 AbstractCegarLoop]: Abstraction has 1170 states and 1898 transitions. [2020-12-22 09:02:52,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:02:52,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1898 transitions. [2020-12-22 09:02:52,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 09:02:52,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:52,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:02:52,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:02:52,805 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:52,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:52,806 INFO L82 PathProgramCache]: Analyzing trace with hash 47496755, now seen corresponding path program 1 times [2020-12-22 09:02:52,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:52,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398416103] [2020-12-22 09:02:52,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:02:52,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398416103] [2020-12-22 09:02:52,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:52,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:02:52,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410792641] [2020-12-22 09:02:52,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:02:52,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:52,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:02:52,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:02:52,906 INFO L87 Difference]: Start difference. First operand 1170 states and 1898 transitions. Second operand 4 states. [2020-12-22 09:02:53,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:53,078 INFO L93 Difference]: Finished difference Result 3409 states and 5599 transitions. [2020-12-22 09:02:53,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:02:53,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-12-22 09:02:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:53,092 INFO L225 Difference]: With dead ends: 3409 [2020-12-22 09:02:53,093 INFO L226 Difference]: Without dead ends: 2296 [2020-12-22 09:02:53,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:02:53,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2020-12-22 09:02:53,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1724. [2020-12-22 09:02:53,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1724 states. [2020-12-22 09:02:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2808 transitions. [2020-12-22 09:02:53,213 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2808 transitions. Word has length 69 [2020-12-22 09:02:53,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:53,215 INFO L481 AbstractCegarLoop]: Abstraction has 1724 states and 2808 transitions. [2020-12-22 09:02:53,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:02:53,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2808 transitions. [2020-12-22 09:02:53,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:02:53,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:53,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:02:53,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:02:53,218 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:53,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:53,218 INFO L82 PathProgramCache]: Analyzing trace with hash -613931840, now seen corresponding path program 1 times [2020-12-22 09:02:53,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:53,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738741596] [2020-12-22 09:02:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:53,308 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 09:02:53,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738741596] [2020-12-22 09:02:53,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:53,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:02:53,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377938664] [2020-12-22 09:02:53,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:02:53,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:53,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:02:53,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:02:53,311 INFO L87 Difference]: Start difference. First operand 1724 states and 2808 transitions. Second operand 3 states. [2020-12-22 09:02:53,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:53,513 INFO L93 Difference]: Finished difference Result 3779 states and 6218 transitions. [2020-12-22 09:02:53,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:02:53,514 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 09:02:53,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:53,528 INFO L225 Difference]: With dead ends: 3779 [2020-12-22 09:02:53,528 INFO L226 Difference]: Without dead ends: 2591 [2020-12-22 09:02:53,530 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 09:02:53,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2020-12-22 09:02:53,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2589. [2020-12-22 09:02:53,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2589 states. [2020-12-22 09:02:53,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 4227 transitions. [2020-12-22 09:02:53,697 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 4227 transitions. Word has length 70 [2020-12-22 09:02:53,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:53,698 INFO L481 AbstractCegarLoop]: Abstraction has 2589 states and 4227 transitions. [2020-12-22 09:02:53,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:02:53,698 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 4227 transitions. [2020-12-22 09:02:53,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:02:53,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:53,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:02:53,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:02:53,699 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:53,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:53,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1843763252, now seen corresponding path program 1 times [2020-12-22 09:02:53,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:53,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143214938] [2020-12-22 09:02:53,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:53,784 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 09:02:53,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143214938] [2020-12-22 09:02:53,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:53,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:02:53,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514129753] [2020-12-22 09:02:53,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:02:53,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:53,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:02:53,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:02:53,786 INFO L87 Difference]: Start difference. First operand 2589 states and 4227 transitions. Second operand 3 states. [2020-12-22 09:02:54,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:54,021 INFO L93 Difference]: Finished difference Result 5033 states and 8246 transitions. [2020-12-22 09:02:54,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:02:54,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 09:02:54,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:54,042 INFO L225 Difference]: With dead ends: 5033 [2020-12-22 09:02:54,043 INFO L226 Difference]: Without dead ends: 3599 [2020-12-22 09:02:54,049 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 09:02:54,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3599 states. [2020-12-22 09:02:54,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3599 to 3597. [2020-12-22 09:02:54,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3597 states. [2020-12-22 09:02:54,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3597 states to 3597 states and 5857 transitions. [2020-12-22 09:02:54,277 INFO L78 Accepts]: Start accepts. Automaton has 3597 states and 5857 transitions. Word has length 70 [2020-12-22 09:02:54,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:54,277 INFO L481 AbstractCegarLoop]: Abstraction has 3597 states and 5857 transitions. [2020-12-22 09:02:54,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:02:54,277 INFO L276 IsEmpty]: Start isEmpty. Operand 3597 states and 5857 transitions. [2020-12-22 09:02:54,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:02:54,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:54,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:02:54,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:02:54,285 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:54,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:54,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1414453242, now seen corresponding path program 1 times [2020-12-22 09:02:54,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:54,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409138756] [2020-12-22 09:02:54,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:54,416 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 09:02:54,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409138756] [2020-12-22 09:02:54,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:54,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:02:54,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261399693] [2020-12-22 09:02:54,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:02:54,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:54,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:02:54,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:02:54,419 INFO L87 Difference]: Start difference. First operand 3597 states and 5857 transitions. Second operand 4 states. [2020-12-22 09:02:54,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:54,961 INFO L93 Difference]: Finished difference Result 11637 states and 19017 transitions. [2020-12-22 09:02:54,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:02:54,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-12-22 09:02:54,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:55,002 INFO L225 Difference]: With dead ends: 11637 [2020-12-22 09:02:55,002 INFO L226 Difference]: Without dead ends: 8115 [2020-12-22 09:02:55,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:02:55,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8115 states. [2020-12-22 09:02:55,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8115 to 5670. [2020-12-22 09:02:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5670 states. [2020-12-22 09:02:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5670 states to 5670 states and 9202 transitions. [2020-12-22 09:02:55,524 INFO L78 Accepts]: Start accepts. Automaton has 5670 states and 9202 transitions. Word has length 70 [2020-12-22 09:02:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:55,525 INFO L481 AbstractCegarLoop]: Abstraction has 5670 states and 9202 transitions. [2020-12-22 09:02:55,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:02:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 5670 states and 9202 transitions. [2020-12-22 09:02:55,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:02:55,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:55,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:02:55,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:02:55,527 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:55,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:55,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1510229994, now seen corresponding path program 1 times [2020-12-22 09:02:55,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:55,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270212841] [2020-12-22 09:02:55,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:55,581 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 09:02:55,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270212841] [2020-12-22 09:02:55,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:55,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:02:55,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391601464] [2020-12-22 09:02:55,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:02:55,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:55,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:02:55,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:02:55,590 INFO L87 Difference]: Start difference. First operand 5670 states and 9202 transitions. Second operand 3 states. [2020-12-22 09:02:56,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:56,110 INFO L93 Difference]: Finished difference Result 11090 states and 18039 transitions. [2020-12-22 09:02:56,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:02:56,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 09:02:56,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:56,156 INFO L225 Difference]: With dead ends: 11090 [2020-12-22 09:02:56,156 INFO L226 Difference]: Without dead ends: 7838 [2020-12-22 09:02:56,164 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 09:02:56,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7838 states. [2020-12-22 09:02:56,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7838 to 7836. [2020-12-22 09:02:56,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7836 states. [2020-12-22 09:02:56,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 12656 transitions. [2020-12-22 09:02:56,768 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 12656 transitions. Word has length 70 [2020-12-22 09:02:56,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:56,768 INFO L481 AbstractCegarLoop]: Abstraction has 7836 states and 12656 transitions. [2020-12-22 09:02:56,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:02:56,769 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 12656 transitions. [2020-12-22 09:02:56,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 09:02:56,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:56,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:02:56,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:02:56,770 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:56,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:56,771 INFO L82 PathProgramCache]: Analyzing trace with hash 844989402, now seen corresponding path program 1 times [2020-12-22 09:02:56,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:56,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89923280] [2020-12-22 09:02:56,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:56,847 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 09:02:56,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89923280] [2020-12-22 09:02:56,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:56,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:02:56,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151274735] [2020-12-22 09:02:56,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:02:56,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:56,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:02:56,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:02:56,849 INFO L87 Difference]: Start difference. First operand 7836 states and 12656 transitions. Second operand 4 states. [2020-12-22 09:02:57,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:57,865 INFO L93 Difference]: Finished difference Result 25425 states and 41161 transitions. [2020-12-22 09:02:57,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:02:57,865 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 09:02:57,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:57,910 INFO L225 Difference]: With dead ends: 25425 [2020-12-22 09:02:57,910 INFO L226 Difference]: Without dead ends: 17680 [2020-12-22 09:02:57,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:02:57,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17680 states. [2020-12-22 09:02:58,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17680 to 12235. [2020-12-22 09:02:58,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12235 states. [2020-12-22 09:02:58,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12235 states to 12235 states and 19663 transitions. [2020-12-22 09:02:58,835 INFO L78 Accepts]: Start accepts. Automaton has 12235 states and 19663 transitions. Word has length 71 [2020-12-22 09:02:58,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:58,835 INFO L481 AbstractCegarLoop]: Abstraction has 12235 states and 19663 transitions. [2020-12-22 09:02:58,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:02:58,836 INFO L276 IsEmpty]: Start isEmpty. Operand 12235 states and 19663 transitions. [2020-12-22 09:02:58,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 09:02:58,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:58,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:02:58,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:02:58,838 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:58,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:58,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1231314837, now seen corresponding path program 1 times [2020-12-22 09:02:58,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:58,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293243609] [2020-12-22 09:02:58,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:59,033 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 09:02:59,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293243609] [2020-12-22 09:02:59,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:59,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:02:59,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716762828] [2020-12-22 09:02:59,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:02:59,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:59,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:02:59,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:02:59,044 INFO L87 Difference]: Start difference. First operand 12235 states and 19663 transitions. Second operand 4 states. [2020-12-22 09:03:00,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:00,464 INFO L93 Difference]: Finished difference Result 35934 states and 57718 transitions. [2020-12-22 09:03:00,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:03:00,464 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 09:03:00,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:00,529 INFO L225 Difference]: With dead ends: 35934 [2020-12-22 09:03:00,529 INFO L226 Difference]: Without dead ends: 23708 [2020-12-22 09:03:00,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:03:00,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23708 states. [2020-12-22 09:03:02,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23708 to 23706. [2020-12-22 09:03:02,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23706 states. [2020-12-22 09:03:02,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23706 states to 23706 states and 37843 transitions. [2020-12-22 09:03:02,223 INFO L78 Accepts]: Start accepts. Automaton has 23706 states and 37843 transitions. Word has length 73 [2020-12-22 09:03:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:02,224 INFO L481 AbstractCegarLoop]: Abstraction has 23706 states and 37843 transitions. [2020-12-22 09:03:02,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:03:02,224 INFO L276 IsEmpty]: Start isEmpty. Operand 23706 states and 37843 transitions. [2020-12-22 09:03:02,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 09:03:02,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:02,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:02,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:03:02,226 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:02,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:02,227 INFO L82 PathProgramCache]: Analyzing trace with hash -940832745, now seen corresponding path program 1 times [2020-12-22 09:03:02,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:02,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882139069] [2020-12-22 09:03:02,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:02,265 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 09:03:02,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882139069] [2020-12-22 09:03:02,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:02,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:02,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430060152] [2020-12-22 09:03:02,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:02,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:02,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:02,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:02,268 INFO L87 Difference]: Start difference. First operand 23706 states and 37843 transitions. Second operand 3 states. [2020-12-22 09:03:04,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:04,324 INFO L93 Difference]: Finished difference Result 71080 states and 113467 transitions. [2020-12-22 09:03:04,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:04,324 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 09:03:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:04,435 INFO L225 Difference]: With dead ends: 71080 [2020-12-22 09:03:04,435 INFO L226 Difference]: Without dead ends: 47402 [2020-12-22 09:03:04,469 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 09:03:04,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47402 states. [2020-12-22 09:03:06,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47402 to 23708. [2020-12-22 09:03:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23708 states. [2020-12-22 09:03:06,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23708 states to 23708 states and 37845 transitions. [2020-12-22 09:03:06,516 INFO L78 Accepts]: Start accepts. Automaton has 23708 states and 37845 transitions. Word has length 74 [2020-12-22 09:03:06,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:06,516 INFO L481 AbstractCegarLoop]: Abstraction has 23708 states and 37845 transitions. [2020-12-22 09:03:06,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:06,517 INFO L276 IsEmpty]: Start isEmpty. Operand 23708 states and 37845 transitions. [2020-12-22 09:03:06,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 09:03:06,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:06,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:06,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:03:06,518 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:06,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:06,519 INFO L82 PathProgramCache]: Analyzing trace with hash 826320946, now seen corresponding path program 1 times [2020-12-22 09:03:06,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:06,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834378717] [2020-12-22 09:03:06,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:06,571 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 09:03:06,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834378717] [2020-12-22 09:03:06,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:06,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:06,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452388737] [2020-12-22 09:03:06,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:06,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:06,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:06,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:06,574 INFO L87 Difference]: Start difference. First operand 23708 states and 37845 transitions. Second operand 3 states. [2020-12-22 09:03:08,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:08,319 INFO L93 Difference]: Finished difference Result 57125 states and 91716 transitions. [2020-12-22 09:03:08,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:08,320 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 09:03:08,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:08,379 INFO L225 Difference]: With dead ends: 57125 [2020-12-22 09:03:08,380 INFO L226 Difference]: Without dead ends: 33546 [2020-12-22 09:03:08,420 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 09:03:08,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33546 states. [2020-12-22 09:03:10,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33546 to 32634. [2020-12-22 09:03:10,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32634 states. [2020-12-22 09:03:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32634 states to 32634 states and 52000 transitions. [2020-12-22 09:03:10,263 INFO L78 Accepts]: Start accepts. Automaton has 32634 states and 52000 transitions. Word has length 74 [2020-12-22 09:03:10,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:10,263 INFO L481 AbstractCegarLoop]: Abstraction has 32634 states and 52000 transitions. [2020-12-22 09:03:10,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:10,263 INFO L276 IsEmpty]: Start isEmpty. Operand 32634 states and 52000 transitions. [2020-12-22 09:03:10,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 09:03:10,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:10,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:10,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:03:10,264 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:10,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:10,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1329573307, now seen corresponding path program 1 times [2020-12-22 09:03:10,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:10,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94423233] [2020-12-22 09:03:10,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:10,331 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 09:03:10,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94423233] [2020-12-22 09:03:10,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:10,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:10,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038969510] [2020-12-22 09:03:10,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:10,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:10,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:10,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:10,333 INFO L87 Difference]: Start difference. First operand 32634 states and 52000 transitions. Second operand 3 states. [2020-12-22 09:03:14,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:14,328 INFO L93 Difference]: Finished difference Result 95603 states and 152270 transitions. [2020-12-22 09:03:14,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:14,329 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 09:03:14,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:14,429 INFO L225 Difference]: With dead ends: 95603 [2020-12-22 09:03:14,429 INFO L226 Difference]: Without dead ends: 63142 [2020-12-22 09:03:14,457 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 09:03:14,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63142 states. [2020-12-22 09:03:18,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63142 to 63140. [2020-12-22 09:03:18,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63140 states. [2020-12-22 09:03:18,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63140 states to 63140 states and 99869 transitions. [2020-12-22 09:03:18,156 INFO L78 Accepts]: Start accepts. Automaton has 63140 states and 99869 transitions. Word has length 75 [2020-12-22 09:03:18,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:18,157 INFO L481 AbstractCegarLoop]: Abstraction has 63140 states and 99869 transitions. [2020-12-22 09:03:18,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:18,157 INFO L276 IsEmpty]: Start isEmpty. Operand 63140 states and 99869 transitions. [2020-12-22 09:03:18,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 09:03:18,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:18,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:18,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:03:18,158 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:18,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:18,159 INFO L82 PathProgramCache]: Analyzing trace with hash -121452674, now seen corresponding path program 1 times [2020-12-22 09:03:18,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:18,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196774055] [2020-12-22 09:03:18,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:18,262 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 09:03:18,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196774055] [2020-12-22 09:03:18,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:18,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:03:18,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221200055] [2020-12-22 09:03:18,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:03:18,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:18,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:03:18,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:03:18,264 INFO L87 Difference]: Start difference. First operand 63140 states and 99869 transitions. Second operand 5 states. [2020-12-22 09:03:24,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:24,871 INFO L93 Difference]: Finished difference Result 177450 states and 280542 transitions. [2020-12-22 09:03:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:03:24,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-12-22 09:03:24,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:25,071 INFO L225 Difference]: With dead ends: 177450 [2020-12-22 09:03:25,071 INFO L226 Difference]: Without dead ends: 114324 [2020-12-22 09:03:25,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:03:25,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114324 states. [2020-12-22 09:03:31,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114324 to 114322. [2020-12-22 09:03:31,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114322 states. [2020-12-22 09:03:32,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114322 states to 114322 states and 179279 transitions. [2020-12-22 09:03:32,409 INFO L78 Accepts]: Start accepts. Automaton has 114322 states and 179279 transitions. Word has length 75 [2020-12-22 09:03:32,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:32,409 INFO L481 AbstractCegarLoop]: Abstraction has 114322 states and 179279 transitions. [2020-12-22 09:03:32,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:03:32,410 INFO L276 IsEmpty]: Start isEmpty. Operand 114322 states and 179279 transitions. [2020-12-22 09:03:32,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 09:03:32,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:32,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:32,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:03:32,413 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:32,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:32,414 INFO L82 PathProgramCache]: Analyzing trace with hash 816290506, now seen corresponding path program 1 times [2020-12-22 09:03:32,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:32,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510562769] [2020-12-22 09:03:32,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:03:32,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510562769] [2020-12-22 09:03:32,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:32,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:03:32,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173824712] [2020-12-22 09:03:32,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:03:32,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:32,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:03:32,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:03:32,516 INFO L87 Difference]: Start difference. First operand 114322 states and 179279 transitions. Second operand 4 states. [2020-12-22 09:03:46,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:46,372 INFO L93 Difference]: Finished difference Result 335211 states and 525140 transitions. [2020-12-22 09:03:46,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:03:46,373 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 09:03:46,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:46,814 INFO L225 Difference]: With dead ends: 335211 [2020-12-22 09:03:46,814 INFO L226 Difference]: Without dead ends: 220945 [2020-12-22 09:03:46,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:03:47,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220945 states. [2020-12-22 09:04:00,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220945 to 220943. [2020-12-22 09:04:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220943 states. [2020-12-22 09:04:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220943 states to 220943 states and 343825 transitions. [2020-12-22 09:04:01,836 INFO L78 Accepts]: Start accepts. Automaton has 220943 states and 343825 transitions. Word has length 75 [2020-12-22 09:04:01,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:01,836 INFO L481 AbstractCegarLoop]: Abstraction has 220943 states and 343825 transitions. [2020-12-22 09:04:01,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:01,836 INFO L276 IsEmpty]: Start isEmpty. Operand 220943 states and 343825 transitions. [2020-12-22 09:04:01,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 09:04:01,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:01,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:01,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:04:01,839 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:01,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:01,840 INFO L82 PathProgramCache]: Analyzing trace with hash -353140970, now seen corresponding path program 1 times [2020-12-22 09:04:01,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:01,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381801146] [2020-12-22 09:04:01,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:01,876 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 09:04:01,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381801146] [2020-12-22 09:04:01,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:01,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:01,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460127919] [2020-12-22 09:04:01,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:01,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:01,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:01,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:01,879 INFO L87 Difference]: Start difference. First operand 220943 states and 343825 transitions. Second operand 3 states. [2020-12-22 09:04:29,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:29,335 INFO L93 Difference]: Finished difference Result 662677 states and 1031242 transitions. [2020-12-22 09:04:29,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:29,335 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 09:04:29,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:30,492 INFO L225 Difference]: With dead ends: 662677 [2020-12-22 09:04:30,493 INFO L226 Difference]: Without dead ends: 441825 [2020-12-22 09:04:30,729 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 09:04:31,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441825 states. [2020-12-22 09:04:48,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441825 to 220953. [2020-12-22 09:04:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220953 states. [2020-12-22 09:04:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220953 states to 220953 states and 343835 transitions. [2020-12-22 09:04:49,033 INFO L78 Accepts]: Start accepts. Automaton has 220953 states and 343835 transitions. Word has length 76 [2020-12-22 09:04:49,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:49,039 INFO L481 AbstractCegarLoop]: Abstraction has 220953 states and 343835 transitions. [2020-12-22 09:04:49,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:49,039 INFO L276 IsEmpty]: Start isEmpty. Operand 220953 states and 343835 transitions. [2020-12-22 09:04:49,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 09:04:49,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:49,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:49,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:04:49,042 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:49,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:49,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1791136339, now seen corresponding path program 1 times [2020-12-22 09:04:49,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:49,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557664958] [2020-12-22 09:04:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:49,098 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 09:04:49,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557664958] [2020-12-22 09:04:49,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:49,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:49,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747918604] [2020-12-22 09:04:49,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:49,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:49,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:49,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:49,100 INFO L87 Difference]: Start difference. First operand 220953 states and 343835 transitions. Second operand 3 states.