/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 23:32:06,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 23:32:06,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 23:32:06,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 23:32:06,319 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 23:32:06,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 23:32:06,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 23:32:06,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 23:32:06,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 23:32:06,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 23:32:06,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 23:32:06,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 23:32:06,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 23:32:06,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 23:32:06,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 23:32:06,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 23:32:06,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 23:32:06,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 23:32:06,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 23:32:06,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 23:32:06,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 23:32:06,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 23:32:06,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 23:32:06,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 23:32:06,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 23:32:06,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:32:06,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:32:06,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:32:06,358 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 23:32:06,404 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:32:06,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:32:06,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:32:06,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:32:06,406 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:32:06,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:32:06,407 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:32:06,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:32:06,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:32:06,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:32:06,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:32:06,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:32:06,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:32:06,408 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:32:06,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:32:06,408 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:32:06,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:32:06,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:32:06,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:32:06,409 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:32:06,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:32:06,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:32:06,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:32:06,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:32:06,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:32:06,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:32:06,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:32:06,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:32:06,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:32:06,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:32:06,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:32:06,772 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:32:06,779 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:32:06,781 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:32:06,783 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:32:06,784 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-18 23:32:06,843 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff3d2692e/fa4234709cc14ded9d2a5aa2c847e707/FLAG79a036c68 [2020-08-18 23:32:07,327 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:32:07,328 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-18 23:32:07,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff3d2692e/fa4234709cc14ded9d2a5aa2c847e707/FLAG79a036c68 [2020-08-18 23:32:07,697 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff3d2692e/fa4234709cc14ded9d2a5aa2c847e707 [2020-08-18 23:32:07,707 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:32:07,709 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:32:07,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:32:07,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:32:07,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:32:07,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:32:07" (1/1) ... [2020-08-18 23:32:07,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ef5dd7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:07, skipping insertion in model container [2020-08-18 23:32:07,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:32:07" (1/1) ... [2020-08-18 23:32:07,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:32:07,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:32:07,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:32:07,974 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:32:08,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:32:08,017 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:32:08,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:08 WrapperNode [2020-08-18 23:32:08,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:32:08,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:32:08,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:32:08,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:32:08,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:08" (1/1) ... [2020-08-18 23:32:08,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:08" (1/1) ... [2020-08-18 23:32:08,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:08" (1/1) ... [2020-08-18 23:32:08,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:08" (1/1) ... [2020-08-18 23:32:08,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:08" (1/1) ... [2020-08-18 23:32:08,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:08" (1/1) ... [2020-08-18 23:32:08,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:08" (1/1) ... [2020-08-18 23:32:08,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:32:08,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:32:08,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:32:08,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:32:08,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 23:32:08,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:32:08,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:32:08,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:32:08,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:32:08,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 23:32:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:32:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:32:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:32:08,546 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:32:08,546 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 23:32:08,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:32:08 BoogieIcfgContainer [2020-08-18 23:32:08,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:32:08,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:32:08,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:32:08,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:32:08,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:32:07" (1/3) ... [2020-08-18 23:32:08,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@429e395d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:32:08, skipping insertion in model container [2020-08-18 23:32:08,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:08" (2/3) ... [2020-08-18 23:32:08,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@429e395d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:32:08, skipping insertion in model container [2020-08-18 23:32:08,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:32:08" (3/3) ... [2020-08-18 23:32:08,563 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-18 23:32:08,593 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:32:08,616 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 23:32:08,646 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 23:32:08,674 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:32:08,675 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:32:08,675 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:32:08,675 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:32:08,675 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:32:08,675 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:32:08,676 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:32:08,676 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:32:08,698 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-18 23:32:08,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 23:32:08,705 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:08,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:08,706 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:08,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:08,712 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-18 23:32:08,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:08,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582627307] [2020-08-18 23:32:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:08,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:08,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582627307] [2020-08-18 23:32:08,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:08,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:08,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016124401] [2020-08-18 23:32:08,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:08,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:08,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:08,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:08,950 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-18 23:32:09,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:09,017 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-18 23:32:09,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:09,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 23:32:09,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:09,036 INFO L225 Difference]: With dead ends: 87 [2020-08-18 23:32:09,037 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 23:32:09,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:09,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 23:32:09,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-18 23:32:09,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-18 23:32:09,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-18 23:32:09,086 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-18 23:32:09,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:09,087 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-18 23:32:09,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:09,087 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-18 23:32:09,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 23:32:09,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:09,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:09,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:32:09,090 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:09,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:09,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-18 23:32:09,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:09,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538094997] [2020-08-18 23:32:09,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:09,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:09,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538094997] [2020-08-18 23:32:09,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:09,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:09,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692588930] [2020-08-18 23:32:09,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:09,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:09,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:09,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:09,167 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-18 23:32:09,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:09,201 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-18 23:32:09,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:09,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 23:32:09,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:09,204 INFO L225 Difference]: With dead ends: 117 [2020-08-18 23:32:09,204 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 23:32:09,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:09,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 23:32:09,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-18 23:32:09,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 23:32:09,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-18 23:32:09,219 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-18 23:32:09,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:09,220 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-18 23:32:09,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:09,220 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-18 23:32:09,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 23:32:09,221 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:09,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:09,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:32:09,222 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:09,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:09,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-18 23:32:09,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:09,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417286163] [2020-08-18 23:32:09,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:09,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:09,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417286163] [2020-08-18 23:32:09,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:09,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:09,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607510294] [2020-08-18 23:32:09,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:09,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:09,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:09,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:09,278 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-18 23:32:09,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:09,303 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-18 23:32:09,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:09,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 23:32:09,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:09,305 INFO L225 Difference]: With dead ends: 108 [2020-08-18 23:32:09,305 INFO L226 Difference]: Without dead ends: 75 [2020-08-18 23:32:09,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:09,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-18 23:32:09,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-18 23:32:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-18 23:32:09,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-18 23:32:09,317 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-18 23:32:09,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:09,317 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-18 23:32:09,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:09,318 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-18 23:32:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 23:32:09,319 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:09,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:09,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 23:32:09,319 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:09,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:09,320 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-18 23:32:09,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:09,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893700627] [2020-08-18 23:32:09,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:09,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:09,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893700627] [2020-08-18 23:32:09,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:09,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:09,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962389056] [2020-08-18 23:32:09,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:09,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:09,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:09,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:09,377 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-18 23:32:09,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:09,404 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-18 23:32:09,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:09,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 23:32:09,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:09,409 INFO L225 Difference]: With dead ends: 136 [2020-08-18 23:32:09,409 INFO L226 Difference]: Without dead ends: 134 [2020-08-18 23:32:09,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:09,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-18 23:32:09,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-18 23:32:09,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-18 23:32:09,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-18 23:32:09,426 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-18 23:32:09,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:09,427 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-18 23:32:09,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:09,427 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-18 23:32:09,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 23:32:09,431 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:09,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:09,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 23:32:09,432 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:09,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:09,433 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-18 23:32:09,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:09,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609368131] [2020-08-18 23:32:09,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:09,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:09,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:09,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609368131] [2020-08-18 23:32:09,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:09,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:09,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967968954] [2020-08-18 23:32:09,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:09,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:09,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:09,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:09,527 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-18 23:32:09,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:09,578 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-18 23:32:09,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:09,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 23:32:09,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:09,582 INFO L225 Difference]: With dead ends: 224 [2020-08-18 23:32:09,582 INFO L226 Difference]: Without dead ends: 136 [2020-08-18 23:32:09,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:09,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-18 23:32:09,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-18 23:32:09,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-18 23:32:09,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-18 23:32:09,597 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-18 23:32:09,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:09,597 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-18 23:32:09,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:09,598 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-18 23:32:09,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 23:32:09,599 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:09,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:09,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 23:32:09,600 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:09,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:09,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-18 23:32:09,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:09,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253395130] [2020-08-18 23:32:09,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:09,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:09,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253395130] [2020-08-18 23:32:09,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:09,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:09,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381107352] [2020-08-18 23:32:09,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:09,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:09,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:09,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:09,638 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-18 23:32:09,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:09,658 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-18 23:32:09,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:09,658 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 23:32:09,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:09,673 INFO L225 Difference]: With dead ends: 201 [2020-08-18 23:32:09,673 INFO L226 Difference]: Without dead ends: 138 [2020-08-18 23:32:09,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-18 23:32:09,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-18 23:32:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-18 23:32:09,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-18 23:32:09,699 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-18 23:32:09,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:09,700 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-18 23:32:09,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:09,700 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-18 23:32:09,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 23:32:09,704 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:09,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:09,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 23:32:09,705 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:09,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:09,705 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-18 23:32:09,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:09,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091177107] [2020-08-18 23:32:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:09,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:09,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091177107] [2020-08-18 23:32:09,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:09,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:09,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084446292] [2020-08-18 23:32:09,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:09,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:09,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:09,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:09,771 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-18 23:32:09,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:09,805 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-18 23:32:09,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:09,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 23:32:09,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:09,808 INFO L225 Difference]: With dead ends: 252 [2020-08-18 23:32:09,808 INFO L226 Difference]: Without dead ends: 250 [2020-08-18 23:32:09,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:09,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-18 23:32:09,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-18 23:32:09,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-18 23:32:09,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-18 23:32:09,821 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-18 23:32:09,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:09,822 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-18 23:32:09,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:09,822 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-18 23:32:09,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 23:32:09,823 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:09,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:09,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 23:32:09,824 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:09,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:09,825 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-18 23:32:09,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:09,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629361667] [2020-08-18 23:32:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:09,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:09,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629361667] [2020-08-18 23:32:09,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:09,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:09,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797015124] [2020-08-18 23:32:09,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:09,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:09,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:09,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:09,857 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-18 23:32:09,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:09,888 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-18 23:32:09,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:09,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 23:32:09,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:09,890 INFO L225 Difference]: With dead ends: 432 [2020-08-18 23:32:09,890 INFO L226 Difference]: Without dead ends: 258 [2020-08-18 23:32:09,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:09,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-18 23:32:09,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-18 23:32:09,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-18 23:32:09,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-18 23:32:09,906 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-18 23:32:09,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:09,907 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-18 23:32:09,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:09,907 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-18 23:32:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 23:32:09,909 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:09,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:09,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 23:32:09,910 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:09,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:09,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-18 23:32:09,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:09,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123080753] [2020-08-18 23:32:09,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:09,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:09,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123080753] [2020-08-18 23:32:09,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:09,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:09,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683102942] [2020-08-18 23:32:09,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:09,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:09,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:09,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:09,943 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-18 23:32:09,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:09,962 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-18 23:32:09,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:09,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 23:32:09,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:09,965 INFO L225 Difference]: With dead ends: 384 [2020-08-18 23:32:09,965 INFO L226 Difference]: Without dead ends: 262 [2020-08-18 23:32:09,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:09,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-18 23:32:09,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-18 23:32:09,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-18 23:32:09,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-18 23:32:09,978 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-18 23:32:09,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:09,978 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-18 23:32:09,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:09,979 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-18 23:32:09,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 23:32:09,980 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:09,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:09,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 23:32:09,981 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:09,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:09,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-18 23:32:09,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:09,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111635719] [2020-08-18 23:32:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:10,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:10,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111635719] [2020-08-18 23:32:10,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:10,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:10,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603468179] [2020-08-18 23:32:10,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:10,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:10,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:10,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:10,034 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-18 23:32:10,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:10,067 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-18 23:32:10,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:10,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 23:32:10,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:10,075 INFO L225 Difference]: With dead ends: 476 [2020-08-18 23:32:10,076 INFO L226 Difference]: Without dead ends: 474 [2020-08-18 23:32:10,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:10,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-18 23:32:10,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-18 23:32:10,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-18 23:32:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-18 23:32:10,096 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-18 23:32:10,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:10,096 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-18 23:32:10,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:10,096 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-18 23:32:10,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 23:32:10,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:10,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:10,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 23:32:10,103 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:10,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:10,103 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-18 23:32:10,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:10,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120309953] [2020-08-18 23:32:10,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:10,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:10,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120309953] [2020-08-18 23:32:10,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:10,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:10,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260864211] [2020-08-18 23:32:10,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:10,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:10,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:10,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:10,129 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-18 23:32:10,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:10,153 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-18 23:32:10,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:10,154 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 23:32:10,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:10,157 INFO L225 Difference]: With dead ends: 844 [2020-08-18 23:32:10,158 INFO L226 Difference]: Without dead ends: 498 [2020-08-18 23:32:10,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:10,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-18 23:32:10,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-18 23:32:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-18 23:32:10,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-18 23:32:10,177 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-18 23:32:10,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:10,178 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-18 23:32:10,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:10,178 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-18 23:32:10,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 23:32:10,179 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:10,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:10,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 23:32:10,180 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:10,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:10,180 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-18 23:32:10,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:10,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093372977] [2020-08-18 23:32:10,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:10,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:10,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093372977] [2020-08-18 23:32:10,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:10,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:10,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272860885] [2020-08-18 23:32:10,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:10,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:10,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:10,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:10,207 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-18 23:32:10,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:10,227 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-18 23:32:10,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:10,228 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 23:32:10,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:10,231 INFO L225 Difference]: With dead ends: 744 [2020-08-18 23:32:10,231 INFO L226 Difference]: Without dead ends: 506 [2020-08-18 23:32:10,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:10,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-18 23:32:10,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-18 23:32:10,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-18 23:32:10,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-18 23:32:10,249 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-18 23:32:10,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:10,250 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-18 23:32:10,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:10,250 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-18 23:32:10,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 23:32:10,251 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:10,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:10,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 23:32:10,252 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:10,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:10,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-18 23:32:10,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:10,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946008507] [2020-08-18 23:32:10,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:10,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:10,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946008507] [2020-08-18 23:32:10,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:10,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:10,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749477504] [2020-08-18 23:32:10,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:10,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:10,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:10,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:10,278 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-18 23:32:10,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:10,302 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-18 23:32:10,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:10,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 23:32:10,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:10,307 INFO L225 Difference]: With dead ends: 908 [2020-08-18 23:32:10,308 INFO L226 Difference]: Without dead ends: 906 [2020-08-18 23:32:10,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:10,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-18 23:32:10,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-18 23:32:10,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-18 23:32:10,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-18 23:32:10,335 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-18 23:32:10,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:10,335 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-18 23:32:10,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:10,335 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-18 23:32:10,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 23:32:10,337 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:10,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:10,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 23:32:10,338 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:10,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:10,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-18 23:32:10,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:10,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327127103] [2020-08-18 23:32:10,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:10,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:10,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327127103] [2020-08-18 23:32:10,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:10,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:10,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969981122] [2020-08-18 23:32:10,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:10,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:10,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:10,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:10,374 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-18 23:32:10,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:10,407 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-18 23:32:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:10,408 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 23:32:10,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:10,414 INFO L225 Difference]: With dead ends: 1660 [2020-08-18 23:32:10,414 INFO L226 Difference]: Without dead ends: 970 [2020-08-18 23:32:10,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:10,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-18 23:32:10,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-18 23:32:10,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-18 23:32:10,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-18 23:32:10,451 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-18 23:32:10,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:10,452 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-18 23:32:10,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:10,452 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-18 23:32:10,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 23:32:10,454 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:10,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:10,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 23:32:10,455 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:10,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:10,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-18 23:32:10,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:10,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128007028] [2020-08-18 23:32:10,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:10,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:10,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128007028] [2020-08-18 23:32:10,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:10,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:10,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010346173] [2020-08-18 23:32:10,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:10,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:10,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:10,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:10,495 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-18 23:32:10,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:10,522 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-18 23:32:10,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:10,523 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 23:32:10,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:10,528 INFO L225 Difference]: With dead ends: 1452 [2020-08-18 23:32:10,528 INFO L226 Difference]: Without dead ends: 986 [2020-08-18 23:32:10,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:10,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-18 23:32:10,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-18 23:32:10,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-18 23:32:10,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-18 23:32:10,560 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-18 23:32:10,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:10,561 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-18 23:32:10,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:10,561 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-18 23:32:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 23:32:10,562 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:10,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:10,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 23:32:10,563 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:10,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:10,563 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-18 23:32:10,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:10,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657143240] [2020-08-18 23:32:10,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:10,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:10,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657143240] [2020-08-18 23:32:10,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:10,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:10,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545973504] [2020-08-18 23:32:10,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:10,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:10,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:10,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:10,588 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-18 23:32:10,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:10,622 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-18 23:32:10,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:10,622 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 23:32:10,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:10,631 INFO L225 Difference]: With dead ends: 1740 [2020-08-18 23:32:10,631 INFO L226 Difference]: Without dead ends: 1738 [2020-08-18 23:32:10,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-18 23:32:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-18 23:32:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-18 23:32:10,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-18 23:32:10,686 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-18 23:32:10,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:10,687 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-18 23:32:10,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:10,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-18 23:32:10,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 23:32:10,690 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:10,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:10,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 23:32:10,691 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:10,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:10,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-18 23:32:10,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:10,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23228664] [2020-08-18 23:32:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:10,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:10,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23228664] [2020-08-18 23:32:10,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:10,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:10,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648844782] [2020-08-18 23:32:10,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:10,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:10,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:10,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:10,718 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-18 23:32:10,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:10,773 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-18 23:32:10,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:10,774 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 23:32:10,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:10,785 INFO L225 Difference]: With dead ends: 3276 [2020-08-18 23:32:10,786 INFO L226 Difference]: Without dead ends: 1898 [2020-08-18 23:32:10,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:10,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-18 23:32:10,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-18 23:32:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-18 23:32:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-18 23:32:10,853 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-18 23:32:10,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:10,853 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-18 23:32:10,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-18 23:32:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 23:32:10,857 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:10,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:10,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 23:32:10,858 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:10,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:10,858 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-18 23:32:10,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:10,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231053693] [2020-08-18 23:32:10,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:10,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:10,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231053693] [2020-08-18 23:32:10,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:10,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:10,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548206424] [2020-08-18 23:32:10,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:10,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:10,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:10,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:10,892 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-18 23:32:10,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:10,944 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-18 23:32:10,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:10,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 23:32:10,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:10,955 INFO L225 Difference]: With dead ends: 2844 [2020-08-18 23:32:10,955 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 23:32:10,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:10,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 23:32:11,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-18 23:32:11,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-18 23:32:11,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-18 23:32:11,021 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-18 23:32:11,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:11,021 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-18 23:32:11,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:11,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-18 23:32:11,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 23:32:11,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:11,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:11,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 23:32:11,025 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:11,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:11,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-18 23:32:11,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:11,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383955398] [2020-08-18 23:32:11,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:11,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:11,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383955398] [2020-08-18 23:32:11,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:11,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:11,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263842239] [2020-08-18 23:32:11,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:11,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:11,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:11,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:11,088 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-18 23:32:11,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:11,178 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-18 23:32:11,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:11,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 23:32:11,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:11,200 INFO L225 Difference]: With dead ends: 3340 [2020-08-18 23:32:11,200 INFO L226 Difference]: Without dead ends: 3338 [2020-08-18 23:32:11,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:11,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-18 23:32:11,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-18 23:32:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-18 23:32:11,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-18 23:32:11,332 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-18 23:32:11,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:11,332 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-18 23:32:11,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:11,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-18 23:32:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 23:32:11,340 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:11,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:11,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 23:32:11,341 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:11,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:11,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-18 23:32:11,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:11,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678789175] [2020-08-18 23:32:11,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:11,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:11,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678789175] [2020-08-18 23:32:11,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:11,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:11,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155565078] [2020-08-18 23:32:11,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:11,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:11,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:11,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:11,382 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-18 23:32:11,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:11,488 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-18 23:32:11,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:11,488 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 23:32:11,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:11,507 INFO L225 Difference]: With dead ends: 6476 [2020-08-18 23:32:11,508 INFO L226 Difference]: Without dead ends: 3722 [2020-08-18 23:32:11,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:11,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-18 23:32:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-18 23:32:11,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-18 23:32:11,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-18 23:32:11,637 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-18 23:32:11,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:11,637 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-18 23:32:11,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:11,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-18 23:32:11,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 23:32:11,644 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:11,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:11,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 23:32:11,647 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:11,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:11,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-18 23:32:11,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:11,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839816494] [2020-08-18 23:32:11,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:11,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:11,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839816494] [2020-08-18 23:32:11,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:11,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:11,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680403201] [2020-08-18 23:32:11,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:11,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:11,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:11,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:11,686 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-18 23:32:11,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:11,782 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-18 23:32:11,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:11,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 23:32:11,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:11,801 INFO L225 Difference]: With dead ends: 5580 [2020-08-18 23:32:11,802 INFO L226 Difference]: Without dead ends: 3786 [2020-08-18 23:32:11,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:11,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-18 23:32:11,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-18 23:32:11,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-18 23:32:11,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-18 23:32:11,918 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-18 23:32:11,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:11,918 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-18 23:32:11,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:11,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-18 23:32:11,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 23:32:11,924 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:11,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:11,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 23:32:11,925 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:11,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:11,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-18 23:32:11,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:11,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672279822] [2020-08-18 23:32:11,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:11,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:11,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672279822] [2020-08-18 23:32:11,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:11,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:11,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680180032] [2020-08-18 23:32:11,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:11,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:11,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:11,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:11,951 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-18 23:32:12,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:12,064 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-18 23:32:12,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:12,064 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 23:32:12,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:12,106 INFO L225 Difference]: With dead ends: 10956 [2020-08-18 23:32:12,106 INFO L226 Difference]: Without dead ends: 7306 [2020-08-18 23:32:12,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:12,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-18 23:32:12,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-18 23:32:12,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-18 23:32:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-18 23:32:12,413 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-18 23:32:12,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:12,413 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-18 23:32:12,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:12,413 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-18 23:32:12,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 23:32:12,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:12,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:12,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 23:32:12,425 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:12,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:12,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-18 23:32:12,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:12,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523135659] [2020-08-18 23:32:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:12,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:12,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523135659] [2020-08-18 23:32:12,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:12,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:12,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861472306] [2020-08-18 23:32:12,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:12,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:12,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:12,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:12,465 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-18 23:32:12,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:12,591 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-18 23:32:12,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:12,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 23:32:12,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:12,608 INFO L225 Difference]: With dead ends: 8076 [2020-08-18 23:32:12,608 INFO L226 Difference]: Without dead ends: 8074 [2020-08-18 23:32:12,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:12,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-18 23:32:12,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-18 23:32:12,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-18 23:32:12,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-18 23:32:12,795 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-18 23:32:12,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:12,795 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-18 23:32:12,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:12,795 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-18 23:32:12,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 23:32:12,803 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:12,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:12,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 23:32:12,804 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:12,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:12,804 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-18 23:32:12,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:12,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80552977] [2020-08-18 23:32:12,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:12,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:12,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80552977] [2020-08-18 23:32:12,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:12,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:12,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838095045] [2020-08-18 23:32:12,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:12,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:12,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:12,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:12,837 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-18 23:32:13,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:13,069 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-18 23:32:13,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:13,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 23:32:13,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:13,090 INFO L225 Difference]: With dead ends: 12172 [2020-08-18 23:32:13,090 INFO L226 Difference]: Without dead ends: 12170 [2020-08-18 23:32:13,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:13,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-18 23:32:13,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-18 23:32:13,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-18 23:32:13,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-18 23:32:13,326 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-18 23:32:13,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:13,326 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-18 23:32:13,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:13,326 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-18 23:32:13,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 23:32:13,343 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:13,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:13,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 23:32:13,343 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:13,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:13,344 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-18 23:32:13,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:13,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750260987] [2020-08-18 23:32:13,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:13,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:13,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750260987] [2020-08-18 23:32:13,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:13,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:13,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887640516] [2020-08-18 23:32:13,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:13,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:13,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:13,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:13,376 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-18 23:32:13,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:13,691 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-18 23:32:13,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:13,692 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 23:32:13,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:13,719 INFO L225 Difference]: With dead ends: 25228 [2020-08-18 23:32:13,720 INFO L226 Difference]: Without dead ends: 14218 [2020-08-18 23:32:13,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:13,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-18 23:32:14,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-18 23:32:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-18 23:32:14,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-18 23:32:14,120 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-18 23:32:14,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:14,120 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-18 23:32:14,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:14,121 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-18 23:32:14,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 23:32:14,145 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:14,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:14,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 23:32:14,145 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:14,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:14,146 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-18 23:32:14,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:14,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771721699] [2020-08-18 23:32:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:14,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:14,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771721699] [2020-08-18 23:32:14,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:14,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:14,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211631446] [2020-08-18 23:32:14,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:14,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:14,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:14,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:14,173 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-18 23:32:14,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:14,666 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-18 23:32:14,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:14,667 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 23:32:14,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:14,705 INFO L225 Difference]: With dead ends: 21516 [2020-08-18 23:32:14,705 INFO L226 Difference]: Without dead ends: 14602 [2020-08-18 23:32:14,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:14,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-18 23:32:15,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-18 23:32:15,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-18 23:32:15,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-18 23:32:15,199 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-18 23:32:15,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:15,199 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-18 23:32:15,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:15,199 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-18 23:32:15,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 23:32:15,218 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:15,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:15,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 23:32:15,218 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:15,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:15,220 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-18 23:32:15,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:15,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040266234] [2020-08-18 23:32:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:15,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:15,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:15,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040266234] [2020-08-18 23:32:15,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:15,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:15,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798053200] [2020-08-18 23:32:15,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:15,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:15,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:15,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:15,247 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-18 23:32:15,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:15,695 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-18 23:32:15,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:15,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 23:32:15,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:15,737 INFO L225 Difference]: With dead ends: 23562 [2020-08-18 23:32:15,738 INFO L226 Difference]: Without dead ends: 23560 [2020-08-18 23:32:15,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:15,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-18 23:32:16,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-18 23:32:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-18 23:32:16,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-18 23:32:16,143 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-18 23:32:16,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:16,143 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-18 23:32:16,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:16,144 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-18 23:32:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 23:32:16,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:16,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:16,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 23:32:16,176 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:16,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:16,177 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-18 23:32:16,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:16,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244271231] [2020-08-18 23:32:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:16,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:16,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244271231] [2020-08-18 23:32:16,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:16,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:16,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838002932] [2020-08-18 23:32:16,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:16,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:16,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:16,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:16,208 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-18 23:32:17,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:17,050 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-18 23:32:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:17,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 23:32:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:17,051 INFO L225 Difference]: With dead ends: 50184 [2020-08-18 23:32:17,051 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 23:32:17,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 23:32:17,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 23:32:17,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 23:32:17,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 23:32:17,148 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-18 23:32:17,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:17,149 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 23:32:17,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:17,149 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 23:32:17,149 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 23:32:17,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 23:32:17,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 23:32:17,192 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 23:32:17,192 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 23:32:17,192 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 23:32:17,192 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 23:32:17,194 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 23:32:17,194 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 23:32:17,195 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-18 23:32:17,195 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-18 23:32:17,195 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 23:32:17,195 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 23:32:17,195 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 23:32:17,197 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 23:32:17,197 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-18 23:32:17,197 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 23:32:17,197 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-18 23:32:17,197 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 23:32:17,198 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 23:32:17,198 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 23:32:17,198 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-18 23:32:17,198 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-18 23:32:17,198 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-18 23:32:17,199 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-18 23:32:17,199 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-18 23:32:17,199 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-18 23:32:17,199 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-18 23:32:17,199 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 23:32:17,200 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 23:32:17,200 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-18 23:32:17,200 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-18 23:32:17,200 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 23:32:17,200 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 23:32:17,201 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 23:32:17,201 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 23:32:17,201 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 23:32:17,201 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-18 23:32:17,201 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 23:32:17,201 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-18 23:32:17,202 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-18 23:32:17,202 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-18 23:32:17,202 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-18 23:32:17,202 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 23:32:17,202 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 23:32:17,202 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-18 23:32:17,203 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-18 23:32:17,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:32:17 BoogieIcfgContainer [2020-08-18 23:32:17,226 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 23:32:17,230 INFO L168 Benchmark]: Toolchain (without parser) took 9519.62 ms. Allocated memory was 141.0 MB in the beginning and 629.1 MB in the end (delta: 488.1 MB). Free memory was 103.9 MB in the beginning and 415.1 MB in the end (delta: -311.2 MB). Peak memory consumption was 176.9 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:17,233 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 23:32:17,234 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.94 ms. Allocated memory is still 141.0 MB. Free memory was 103.7 MB in the beginning and 92.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:17,242 INFO L168 Benchmark]: Boogie Preprocessor took 128.83 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 92.9 MB in the beginning and 180.4 MB in the end (delta: -87.5 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:17,242 INFO L168 Benchmark]: RCFGBuilder took 404.09 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 161.0 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:17,243 INFO L168 Benchmark]: TraceAbstraction took 8672.83 ms. Allocated memory was 202.9 MB in the beginning and 629.1 MB in the end (delta: 426.2 MB). Free memory was 160.4 MB in the beginning and 415.1 MB in the end (delta: -254.7 MB). Peak memory consumption was 171.6 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:17,250 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 307.94 ms. Allocated memory is still 141.0 MB. Free memory was 103.7 MB in the beginning and 92.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.83 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 92.9 MB in the beginning and 180.4 MB in the end (delta: -87.5 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 404.09 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 161.0 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8672.83 ms. Allocated memory was 202.9 MB in the beginning and 629.1 MB in the end (delta: 426.2 MB). Free memory was 160.4 MB in the beginning and 415.1 MB in the end (delta: -254.7 MB). Peak memory consumption was 171.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.4s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.7s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...