/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_15x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 02:13:41,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 02:13:41,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 02:13:41,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 02:13:41,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 02:13:41,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 02:13:41,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 02:13:41,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 02:13:41,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 02:13:41,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 02:13:41,657 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 02:13:41,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 02:13:41,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 02:13:41,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 02:13:41,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 02:13:41,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 02:13:41,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 02:13:41,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 02:13:41,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 02:13:41,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 02:13:41,677 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 [2020-08-22 02:13:41,708 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 02:13:41,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 02:13:41,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 02:13:41,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 02:13:41,710 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 02:13:41,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 02:13:41,711 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 02:13:41,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 02:13:41,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 02:13:41,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 02:13:41,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 02:13:41,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 02:13:41,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 02:13:41,712 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 02:13:41,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 02:13:41,714 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 02:13:41,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 02:13:41,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 02:13:41,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 02:13:41,715 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 02:13:41,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 02:13:41,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:13:41,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 02:13:41,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 02:13:41,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 02:13:41,717 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 02:13:41,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 02:13:41,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 02:13:41,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 02:13:41,717 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=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-08-22 02:13:42,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 02:13:42,075 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 02:13:42,085 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 02:13:42,090 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 02:13:42,090 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 02:13:42,091 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2020-08-22 02:13:42,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80c7b58ed/f096c4894c8d4d7ab00922ed44c60acc/FLAG859beeb4c [2020-08-22 02:13:42,579 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 02:13:42,580 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2020-08-22 02:13:42,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80c7b58ed/f096c4894c8d4d7ab00922ed44c60acc/FLAG859beeb4c [2020-08-22 02:13:42,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80c7b58ed/f096c4894c8d4d7ab00922ed44c60acc [2020-08-22 02:13:42,926 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 02:13:42,928 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 02:13:42,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 02:13:42,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 02:13:42,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 02:13:42,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:13:42" (1/1) ... [2020-08-22 02:13:42,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b337bef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:42, skipping insertion in model container [2020-08-22 02:13:42,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:13:42" (1/1) ... [2020-08-22 02:13:42,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 02:13:42,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 02:13:43,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:13:43,134 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 02:13:43,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:13:43,165 INFO L208 MainTranslator]: Completed translation [2020-08-22 02:13:43,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:43 WrapperNode [2020-08-22 02:13:43,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 02:13:43,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 02:13:43,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 02:13:43,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 02:13:43,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:43" (1/1) ... [2020-08-22 02:13:43,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:43" (1/1) ... [2020-08-22 02:13:43,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:43" (1/1) ... [2020-08-22 02:13:43,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:43" (1/1) ... [2020-08-22 02:13:43,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:43" (1/1) ... [2020-08-22 02:13:43,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:43" (1/1) ... [2020-08-22 02:13:43,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:43" (1/1) ... [2020-08-22 02:13:43,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 02:13:43,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 02:13:43,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 02:13:43,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 02:13:43,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:43" (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 [2020-08-22 02:13:43,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 02:13:43,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 02:13:43,340 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-22 02:13:43,340 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 02:13:43,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 02:13:43,340 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-22 02:13:43,340 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 02:13:43,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 02:13:43,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 02:13:43,502 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 02:13:43,502 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 02:13:43,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:13:43 BoogieIcfgContainer [2020-08-22 02:13:43,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 02:13:43,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 02:13:43,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 02:13:43,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 02:13:43,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 02:13:42" (1/3) ... [2020-08-22 02:13:43,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@125167ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:13:43, skipping insertion in model container [2020-08-22 02:13:43,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:43" (2/3) ... [2020-08-22 02:13:43,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@125167ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:13:43, skipping insertion in model container [2020-08-22 02:13:43,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:13:43" (3/3) ... [2020-08-22 02:13:43,515 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-2.c [2020-08-22 02:13:43,526 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 02:13:43,534 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 02:13:43,553 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 02:13:43,629 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 02:13:43,629 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 02:13:43,629 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 02:13:43,630 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 02:13:43,630 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 02:13:43,630 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 02:13:43,630 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 02:13:43,630 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 02:13:43,677 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 02:13:43,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 02:13:43,687 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:43,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:43,688 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:43,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:43,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-22 02:13:43,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:43,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512118791] [2020-08-22 02:13:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:43,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:43,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:13:43,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512118791] [2020-08-22 02:13:43,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:13:43,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 02:13:43,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516828204] [2020-08-22 02:13:43,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:13:43,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:43,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:13:43,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:13:43,932 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-22 02:13:44,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:44,025 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-22 02:13:44,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:13:44,027 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 02:13:44,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:44,037 INFO L225 Difference]: With dead ends: 30 [2020-08-22 02:13:44,038 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 02:13:44,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:13:44,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 02:13:44,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 02:13:44,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 02:13:44,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 02:13:44,091 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-22 02:13:44,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:44,092 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 02:13:44,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:13:44,093 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 02:13:44,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 02:13:44,094 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:44,095 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:44,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 02:13:44,096 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:44,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:44,096 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-22 02:13:44,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:44,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177980881] [2020-08-22 02:13:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:44,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:44,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:44,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 02:13:44,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177980881] [2020-08-22 02:13:44,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:44,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 02:13:44,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208225184] [2020-08-22 02:13:44,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 02:13:44,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:44,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 02:13:44,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:13:44,230 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-22 02:13:44,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:44,315 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-22 02:13:44,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 02:13:44,316 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-22 02:13:44,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:44,317 INFO L225 Difference]: With dead ends: 25 [2020-08-22 02:13:44,317 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 02:13:44,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 02:13:44,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 02:13:44,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 02:13:44,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 02:13:44,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 02:13:44,333 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-22 02:13:44,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:44,336 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 02:13:44,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 02:13:44,337 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 02:13:44,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 02:13:44,339 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:44,339 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:44,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 02:13:44,341 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:44,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:44,341 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-22 02:13:44,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:44,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151286706] [2020-08-22 02:13:44,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:44,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:44,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:44,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:44,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 02:13:44,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151286706] [2020-08-22 02:13:44,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:44,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 02:13:44,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263381765] [2020-08-22 02:13:44,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 02:13:44,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:44,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 02:13:44,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:13:44,527 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-22 02:13:44,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:44,596 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-22 02:13:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 02:13:44,597 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-22 02:13:44,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:44,598 INFO L225 Difference]: With dead ends: 28 [2020-08-22 02:13:44,598 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 02:13:44,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 02:13:44,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 02:13:44,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 02:13:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 02:13:44,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 02:13:44,607 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-22 02:13:44,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:44,607 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 02:13:44,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 02:13:44,608 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 02:13:44,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 02:13:44,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:44,609 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:44,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 02:13:44,610 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:44,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:44,610 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-22 02:13:44,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:44,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668350938] [2020-08-22 02:13:44,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:44,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:44,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:44,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:44,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:44,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:44,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 02:13:44,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668350938] [2020-08-22 02:13:44,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:44,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 02:13:44,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852134110] [2020-08-22 02:13:44,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 02:13:44,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:44,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 02:13:44,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 02:13:44,887 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-22 02:13:44,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:44,998 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-22 02:13:44,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 02:13:44,999 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-22 02:13:45,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:45,001 INFO L225 Difference]: With dead ends: 31 [2020-08-22 02:13:45,003 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 02:13:45,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-22 02:13:45,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 02:13:45,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 02:13:45,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 02:13:45,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 02:13:45,019 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-22 02:13:45,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:45,019 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 02:13:45,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 02:13:45,020 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 02:13:45,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 02:13:45,023 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:45,023 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:45,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 02:13:45,024 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:45,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:45,024 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-22 02:13:45,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:45,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837543776] [2020-08-22 02:13:45,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:45,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 02:13:45,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837543776] [2020-08-22 02:13:45,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:45,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 02:13:45,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936428719] [2020-08-22 02:13:45,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 02:13:45,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:45,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 02:13:45,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:13:45,227 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-22 02:13:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:45,309 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 02:13:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 02:13:45,310 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-22 02:13:45,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:45,311 INFO L225 Difference]: With dead ends: 34 [2020-08-22 02:13:45,311 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 02:13:45,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-22 02:13:45,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 02:13:45,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 02:13:45,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 02:13:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 02:13:45,319 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-22 02:13:45,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:45,319 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 02:13:45,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 02:13:45,320 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 02:13:45,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 02:13:45,321 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:45,321 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:45,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 02:13:45,322 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:45,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:45,322 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-22 02:13:45,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:45,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628896206] [2020-08-22 02:13:45,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:45,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 02:13:45,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628896206] [2020-08-22 02:13:45,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:45,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 02:13:45,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919108040] [2020-08-22 02:13:45,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 02:13:45,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:45,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 02:13:45,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 02:13:45,491 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-22 02:13:45,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:45,586 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-22 02:13:45,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 02:13:45,586 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-22 02:13:45,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:45,588 INFO L225 Difference]: With dead ends: 37 [2020-08-22 02:13:45,588 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 02:13:45,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-22 02:13:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 02:13:45,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 02:13:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 02:13:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 02:13:45,596 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-22 02:13:45,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:45,597 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 02:13:45,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 02:13:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 02:13:45,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 02:13:45,599 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:45,599 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:45,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 02:13:45,600 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:45,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:45,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-22 02:13:45,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:45,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783042297] [2020-08-22 02:13:45,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 02:13:45,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783042297] [2020-08-22 02:13:45,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:45,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 02:13:45,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62032722] [2020-08-22 02:13:45,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 02:13:45,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:45,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 02:13:45,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 02:13:45,852 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-22 02:13:45,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:45,975 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-22 02:13:45,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 02:13:45,976 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-22 02:13:45,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:45,977 INFO L225 Difference]: With dead ends: 40 [2020-08-22 02:13:45,977 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 02:13:45,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-22 02:13:45,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 02:13:45,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 02:13:45,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 02:13:45,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 02:13:45,985 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-22 02:13:45,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:45,985 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 02:13:45,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 02:13:45,985 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 02:13:45,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 02:13:45,987 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:45,987 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:45,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 02:13:45,987 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:45,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:45,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-22 02:13:45,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:45,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395961458] [2020-08-22 02:13:45,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 02:13:46,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395961458] [2020-08-22 02:13:46,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:46,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 02:13:46,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960846991] [2020-08-22 02:13:46,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 02:13:46,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:46,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 02:13:46,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-22 02:13:46,230 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-22 02:13:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:46,346 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-22 02:13:46,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 02:13:46,347 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-22 02:13:46,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:46,348 INFO L225 Difference]: With dead ends: 43 [2020-08-22 02:13:46,348 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 02:13:46,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-22 02:13:46,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 02:13:46,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-22 02:13:46,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 02:13:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 02:13:46,355 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-22 02:13:46,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:46,356 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 02:13:46,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 02:13:46,356 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 02:13:46,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 02:13:46,357 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:46,358 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:46,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 02:13:46,358 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:46,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:46,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-22 02:13:46,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:46,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689074558] [2020-08-22 02:13:46,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 02:13:46,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689074558] [2020-08-22 02:13:46,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:46,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 02:13:46,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143376287] [2020-08-22 02:13:46,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 02:13:46,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:46,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 02:13:46,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-22 02:13:46,646 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-22 02:13:46,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:46,781 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 02:13:46,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 02:13:46,782 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-22 02:13:46,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:46,783 INFO L225 Difference]: With dead ends: 46 [2020-08-22 02:13:46,783 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 02:13:46,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-22 02:13:46,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 02:13:46,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 02:13:46,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 02:13:46,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 02:13:46,791 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-22 02:13:46,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:46,791 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 02:13:46,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 02:13:46,792 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 02:13:46,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 02:13:46,793 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:46,793 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:46,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 02:13:46,794 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:46,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:46,794 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-22 02:13:46,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:46,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526881324] [2020-08-22 02:13:46,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:46,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:47,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:47,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:47,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:47,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 02:13:47,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526881324] [2020-08-22 02:13:47,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:47,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 02:13:47,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574253387] [2020-08-22 02:13:47,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 02:13:47,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:47,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 02:13:47,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-22 02:13:47,142 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-22 02:13:47,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:47,288 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 02:13:47,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 02:13:47,290 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-22 02:13:47,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:47,291 INFO L225 Difference]: With dead ends: 49 [2020-08-22 02:13:47,291 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 02:13:47,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-22 02:13:47,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 02:13:47,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 02:13:47,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 02:13:47,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 02:13:47,300 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-22 02:13:47,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:47,300 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 02:13:47,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 02:13:47,300 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 02:13:47,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 02:13:47,302 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:47,302 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:47,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 02:13:47,302 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:47,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:47,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-22 02:13:47,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:47,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843018602] [2020-08-22 02:13:47,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:47,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:47,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:47,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:47,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:47,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:47,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:47,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:47,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:47,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:47,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:47,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:47,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 02:13:47,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843018602] [2020-08-22 02:13:47,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:47,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 02:13:47,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475285919] [2020-08-22 02:13:47,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 02:13:47,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:47,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 02:13:47,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-22 02:13:47,692 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-22 02:13:47,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:47,880 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-22 02:13:47,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 02:13:47,880 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-22 02:13:47,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:47,883 INFO L225 Difference]: With dead ends: 52 [2020-08-22 02:13:47,883 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 02:13:47,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-22 02:13:47,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 02:13:47,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-22 02:13:47,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 02:13:47,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-22 02:13:47,900 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-22 02:13:47,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:47,900 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-22 02:13:47,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 02:13:47,901 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-22 02:13:47,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 02:13:47,903 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:47,903 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:47,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 02:13:47,904 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:47,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:47,904 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-08-22 02:13:47,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:47,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485563772] [2020-08-22 02:13:47,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:47,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:47,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 02:13:48,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485563772] [2020-08-22 02:13:48,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:48,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 02:13:48,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927228273] [2020-08-22 02:13:48,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 02:13:48,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:48,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 02:13:48,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-22 02:13:48,376 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-22 02:13:48,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:48,572 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-22 02:13:48,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 02:13:48,572 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-22 02:13:48,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:48,574 INFO L225 Difference]: With dead ends: 55 [2020-08-22 02:13:48,574 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 02:13:48,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-22 02:13:48,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 02:13:48,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-22 02:13:48,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 02:13:48,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-22 02:13:48,591 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-22 02:13:48,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:48,592 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-22 02:13:48,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 02:13:48,592 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-22 02:13:48,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 02:13:48,594 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:48,594 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:48,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 02:13:48,594 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:48,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:48,595 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-08-22 02:13:48,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:48,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157020173] [2020-08-22 02:13:48,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:48,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:49,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:49,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:49,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 02:13:49,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157020173] [2020-08-22 02:13:49,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:49,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 02:13:49,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037489034] [2020-08-22 02:13:49,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 02:13:49,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:49,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 02:13:49,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-22 02:13:49,152 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-22 02:13:49,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:49,338 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-22 02:13:49,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 02:13:49,339 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-22 02:13:49,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:49,340 INFO L225 Difference]: With dead ends: 58 [2020-08-22 02:13:49,340 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 02:13:49,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-22 02:13:49,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 02:13:49,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-22 02:13:49,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 02:13:49,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-22 02:13:49,352 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-22 02:13:49,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:49,352 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-22 02:13:49,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 02:13:49,353 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-22 02:13:49,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 02:13:49,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:49,356 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:49,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 02:13:49,356 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:49,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:49,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-08-22 02:13:49,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:49,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589802946] [2020-08-22 02:13:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:49,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:49,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:49,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:49,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:49,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:49,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:49,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:49,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:49,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:49,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:49,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:49,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:49,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:49,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:49,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:49,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 02:13:49,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589802946] [2020-08-22 02:13:49,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:49,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 02:13:49,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787530797] [2020-08-22 02:13:49,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 02:13:49,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:49,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 02:13:49,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-22 02:13:49,997 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-22 02:13:50,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:50,238 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-22 02:13:50,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 02:13:50,239 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-22 02:13:50,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:50,240 INFO L225 Difference]: With dead ends: 61 [2020-08-22 02:13:50,240 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 02:13:50,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-22 02:13:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 02:13:50,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-22 02:13:50,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 02:13:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-22 02:13:50,257 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-22 02:13:50,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:50,260 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-22 02:13:50,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 02:13:50,260 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-22 02:13:50,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 02:13:50,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:50,263 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:50,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 02:13:50,263 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:50,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:50,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-08-22 02:13:50,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:50,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751345191] [2020-08-22 02:13:50,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:50,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:50,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:50,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:50,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:50,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:50,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:50,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:50,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:50,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:50,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:50,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:50,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:50,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:50,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:50,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:50,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:50,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 02:13:50,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751345191] [2020-08-22 02:13:50,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:50,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 02:13:50,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622543075] [2020-08-22 02:13:50,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 02:13:50,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:50,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 02:13:50,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-22 02:13:50,894 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-22 02:13:51,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:51,126 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-22 02:13:51,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 02:13:51,127 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-22 02:13:51,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:51,128 INFO L225 Difference]: With dead ends: 64 [2020-08-22 02:13:51,128 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 02:13:51,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 02:13:51,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 02:13:51,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-22 02:13:51,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 02:13:51,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-22 02:13:51,142 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-22 02:13:51,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:51,143 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-22 02:13:51,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 02:13:51,144 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-22 02:13:51,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 02:13:51,145 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:51,145 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:51,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 02:13:51,146 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:51,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:51,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-08-22 02:13:51,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:51,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722952351] [2020-08-22 02:13:51,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 02:13:51,211 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 02:13:51,211 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 02:13:51,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 02:13:51,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 02:13:51 BoogieIcfgContainer [2020-08-22 02:13:51,244 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 02:13:51,247 INFO L168 Benchmark]: Toolchain (without parser) took 8317.92 ms. Allocated memory was 140.5 MB in the beginning and 346.6 MB in the end (delta: 206.0 MB). Free memory was 103.7 MB in the beginning and 311.5 MB in the end (delta: -207.9 MB). Peak memory consumption was 214.3 MB. Max. memory is 7.1 GB. [2020-08-22 02:13:51,248 INFO L168 Benchmark]: CDTParser took 0.75 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 02:13:51,249 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.03 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 94.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-22 02:13:51,249 INFO L168 Benchmark]: Boogie Preprocessor took 27.05 ms. Allocated memory is still 140.5 MB. Free memory was 94.2 MB in the beginning and 92.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-22 02:13:51,250 INFO L168 Benchmark]: RCFGBuilder took 312.56 ms. Allocated memory was 140.5 MB in the beginning and 201.3 MB in the end (delta: 60.8 MB). Free memory was 92.8 MB in the beginning and 169.9 MB in the end (delta: -77.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-22 02:13:51,251 INFO L168 Benchmark]: TraceAbstraction took 7736.33 ms. Allocated memory was 201.3 MB in the beginning and 346.6 MB in the end (delta: 145.2 MB). Free memory was 169.3 MB in the beginning and 311.5 MB in the end (delta: -142.3 MB). Peak memory consumption was 219.1 MB. Max. memory is 7.1 GB. [2020-08-22 02:13:51,254 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.75 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 237.03 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 94.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.05 ms. Allocated memory is still 140.5 MB. Free memory was 94.2 MB in the beginning and 92.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 312.56 ms. Allocated memory was 140.5 MB in the beginning and 201.3 MB in the end (delta: 60.8 MB). Free memory was 92.8 MB in the beginning and 169.9 MB in the end (delta: -77.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7736.33 ms. Allocated memory was 201.3 MB in the beginning and 346.6 MB in the end (delta: 145.2 MB). Free memory was 169.3 MB in the beginning and 311.5 MB in the end (delta: -142.3 MB). Peak memory consumption was 219.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 15; [L13] int b = 0; [L14] CALL, EXPR sum(a, b) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND TRUE n <= 0 [L5] return m + n; [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) [L14] int result = sum(a, b); [L15] COND TRUE result == a + b [L16] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.5s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 183 SDtfs, 318 SDslu, 711 SDs, 0 SdLazy, 522 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 928 NumberOfCodeBlocks, 928 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 810 ConstructedInterpolants, 0 QuantifiedInterpolants, 133800 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 1575/3150 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 incorrect! Received shutdown request...