/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_20x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:16:31,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:16:31,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:16:31,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:16:31,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:16:31,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:16:31,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:16:31,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:16:31,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:16:31,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:16:31,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:16:31,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:16:31,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:16:31,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:16:31,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:16:31,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:16:31,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:16:31,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:16:31,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:16:31,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:16:31,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:16:31,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:16:31,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:16:31,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:16:31,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 16:16:31,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:16:31,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:16:31,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:16:31,593 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 16:16:31,617 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:16:31,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:16:31,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:16:31,618 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:16:31,618 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:16:31,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:16:31,619 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:16:31,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:16:31,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:16:31,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:16:31,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:16:31,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:16:31,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:16:31,620 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:16:31,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:16:31,621 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:16:31,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:16:31,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:16:31,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:16:31,622 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:16:31,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:16:31,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:16:31,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:16:31,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:16:31,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:16:31,623 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:16:31,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:16:31,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:16:31,623 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:16:31,624 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 [2020-08-18 16:16:31,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:16:31,940 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:16:31,944 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:16:31,945 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:16:31,946 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:16:31,946 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_20x0-1.c [2020-08-18 16:16:32,009 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c2a174b1/c746f50bb1e34b6d80ce69998ba1bfa2/FLAG946a22fd5 [2020-08-18 16:16:32,424 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:16:32,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_20x0-1.c [2020-08-18 16:16:32,432 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c2a174b1/c746f50bb1e34b6d80ce69998ba1bfa2/FLAG946a22fd5 [2020-08-18 16:16:32,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c2a174b1/c746f50bb1e34b6d80ce69998ba1bfa2 [2020-08-18 16:16:32,866 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:16:32,868 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:16:32,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:16:32,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:16:32,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:16:32,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:16:32" (1/1) ... [2020-08-18 16:16:32,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48b9c226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:32, skipping insertion in model container [2020-08-18 16:16:32,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:16:32" (1/1) ... [2020-08-18 16:16:32,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:16:32,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:16:33,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:16:33,073 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:16:33,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:16:33,106 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:16:33,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:33 WrapperNode [2020-08-18 16:16:33,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:16:33,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:16:33,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:16:33,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:16:33,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:33" (1/1) ... [2020-08-18 16:16:33,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:33" (1/1) ... [2020-08-18 16:16:33,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:33" (1/1) ... [2020-08-18 16:16:33,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:33" (1/1) ... [2020-08-18 16:16:33,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:33" (1/1) ... [2020-08-18 16:16:33,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:33" (1/1) ... [2020-08-18 16:16:33,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:33" (1/1) ... [2020-08-18 16:16:33,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:16:33,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:16:33,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:16:33,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:16:33,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:16:33,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:16:33,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:16:33,367 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-18 16:16:33,368 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:16:33,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:16:33,368 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-18 16:16:33,368 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:16:33,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:16:33,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:16:33,544 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:16:33,544 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 16:16:33,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:16:33 BoogieIcfgContainer [2020-08-18 16:16:33,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:16:33,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:16:33,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:16:33,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:16:33,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:16:32" (1/3) ... [2020-08-18 16:16:33,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa1728a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:16:33, skipping insertion in model container [2020-08-18 16:16:33,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:33" (2/3) ... [2020-08-18 16:16:33,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa1728a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:16:33, skipping insertion in model container [2020-08-18 16:16:33,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:16:33" (3/3) ... [2020-08-18 16:16:33,557 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_20x0-1.c [2020-08-18 16:16:33,572 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:16:33,580 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:16:33,608 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:16:33,663 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:16:33,663 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:16:33,664 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:16:33,664 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:16:33,664 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:16:33,664 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:16:33,664 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:16:33,664 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:16:33,693 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 16:16:33,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 16:16:33,702 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:33,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:33,703 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:33,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:33,712 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-18 16:16:33,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:33,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207045625] [2020-08-18 16:16:33,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:33,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:33,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:16:33,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207045625] [2020-08-18 16:16:33,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:16:33,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:16:33,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760299418] [2020-08-18 16:16:33,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:16:33,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:33,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:16:34,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:16:34,003 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-18 16:16:34,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:34,080 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-18 16:16:34,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:16:34,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 16:16:34,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:34,094 INFO L225 Difference]: With dead ends: 30 [2020-08-18 16:16:34,094 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 16:16:34,097 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 [2020-08-18 16:16:34,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 16:16:34,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 16:16:34,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 16:16:34,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 16:16:34,141 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-18 16:16:34,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:34,142 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 16:16:34,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:16:34,142 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 16:16:34,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 16:16:34,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:34,145 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:34,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:16:34,145 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:34,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:34,146 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-18 16:16:34,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:34,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609845307] [2020-08-18 16:16:34,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:34,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:34,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:34,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 16:16:34,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609845307] [2020-08-18 16:16:34,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:34,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 16:16:34,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986533030] [2020-08-18 16:16:34,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 16:16:34,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:34,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 16:16:34,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:16:34,292 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-18 16:16:34,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:34,368 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-18 16:16:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 16:16:34,369 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-18 16:16:34,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:34,371 INFO L225 Difference]: With dead ends: 25 [2020-08-18 16:16:34,371 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 16:16:34,372 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 [2020-08-18 16:16:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 16:16:34,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 16:16:34,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 16:16:34,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 16:16:34,380 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-18 16:16:34,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:34,380 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 16:16:34,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 16:16:34,381 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 16:16:34,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 16:16:34,382 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:34,382 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:34,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:16:34,383 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:34,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:34,384 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-18 16:16:34,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:34,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759220189] [2020-08-18 16:16:34,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:34,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:34,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:34,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:34,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 16:16:34,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759220189] [2020-08-18 16:16:34,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:34,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 16:16:34,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587810524] [2020-08-18 16:16:34,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 16:16:34,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:34,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 16:16:34,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 16:16:34,611 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-18 16:16:34,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:34,689 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-18 16:16:34,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 16:16:34,690 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-18 16:16:34,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:34,691 INFO L225 Difference]: With dead ends: 28 [2020-08-18 16:16:34,692 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 16:16:34,692 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 [2020-08-18 16:16:34,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 16:16:34,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-18 16:16:34,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 16:16:34,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-18 16:16:34,700 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-18 16:16:34,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:34,701 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-18 16:16:34,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 16:16:34,701 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-18 16:16:34,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 16:16:34,703 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:34,703 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:34,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:16:34,704 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:34,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:34,704 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-18 16:16:34,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:34,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937438354] [2020-08-18 16:16:34,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:34,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:34,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:34,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:34,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:34,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 16:16:34,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937438354] [2020-08-18 16:16:34,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:34,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 16:16:34,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951508373] [2020-08-18 16:16:34,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 16:16:34,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:34,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 16:16:34,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:16:34,888 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-18 16:16:34,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:34,996 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-18 16:16:34,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 16:16:34,997 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-18 16:16:34,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:34,999 INFO L225 Difference]: With dead ends: 31 [2020-08-18 16:16:34,999 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 16:16:35,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-18 16:16:35,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 16:16:35,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-18 16:16:35,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 16:16:35,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-18 16:16:35,016 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-18 16:16:35,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:35,016 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-18 16:16:35,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 16:16:35,018 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-18 16:16:35,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 16:16:35,019 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:35,020 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:35,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:16:35,020 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:35,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:35,021 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-18 16:16:35,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:35,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312480521] [2020-08-18 16:16:35,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-18 16:16:35,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312480521] [2020-08-18 16:16:35,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:35,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 16:16:35,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992729406] [2020-08-18 16:16:35,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 16:16:35,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:35,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 16:16:35,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 16:16:35,244 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-18 16:16:35,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:35,327 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-18 16:16:35,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 16:16:35,328 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-18 16:16:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:35,330 INFO L225 Difference]: With dead ends: 34 [2020-08-18 16:16:35,330 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 16:16:35,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-18 16:16:35,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 16:16:35,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 16:16:35,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 16:16:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-18 16:16:35,338 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-18 16:16:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:35,339 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-18 16:16:35,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 16:16:35,339 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-18 16:16:35,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 16:16:35,341 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:35,341 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:35,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 16:16:35,341 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:35,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:35,342 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-18 16:16:35,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:35,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341162883] [2020-08-18 16:16:35,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-18 16:16:35,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341162883] [2020-08-18 16:16:35,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:35,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 16:16:35,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36875979] [2020-08-18 16:16:35,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 16:16:35,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:35,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 16:16:35,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 16:16:35,590 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-18 16:16:35,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:35,692 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-18 16:16:35,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 16:16:35,693 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-18 16:16:35,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:35,695 INFO L225 Difference]: With dead ends: 37 [2020-08-18 16:16:35,695 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 16:16:35,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-18 16:16:35,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 16:16:35,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-18 16:16:35,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 16:16:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-18 16:16:35,704 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-18 16:16:35,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:35,704 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-18 16:16:35,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 16:16:35,705 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-18 16:16:35,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 16:16:35,706 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:35,707 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:35,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 16:16:35,707 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:35,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:35,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-18 16:16:35,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:35,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780385460] [2020-08-18 16:16:35,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-18 16:16:35,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780385460] [2020-08-18 16:16:35,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:35,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 16:16:35,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573720756] [2020-08-18 16:16:35,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 16:16:35,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:35,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 16:16:35,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-18 16:16:35,944 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-18 16:16:36,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:36,053 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-18 16:16:36,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 16:16:36,053 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-18 16:16:36,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:36,055 INFO L225 Difference]: With dead ends: 40 [2020-08-18 16:16:36,055 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 16:16:36,056 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 [2020-08-18 16:16:36,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 16:16:36,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-18 16:16:36,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 16:16:36,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-18 16:16:36,062 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-18 16:16:36,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:36,063 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-18 16:16:36,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 16:16:36,063 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-18 16:16:36,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 16:16:36,064 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:36,064 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:36,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 16:16:36,065 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:36,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:36,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-18 16:16:36,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:36,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464904705] [2020-08-18 16:16:36,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:36,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-18 16:16:36,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464904705] [2020-08-18 16:16:36,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:36,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 16:16:36,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595044490] [2020-08-18 16:16:36,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 16:16:36,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:36,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 16:16:36,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-18 16:16:36,287 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-18 16:16:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:36,409 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-18 16:16:36,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 16:16:36,410 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-18 16:16:36,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:36,411 INFO L225 Difference]: With dead ends: 43 [2020-08-18 16:16:36,411 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 16:16:36,412 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 [2020-08-18 16:16:36,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 16:16:36,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-18 16:16:36,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 16:16:36,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-18 16:16:36,419 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-18 16:16:36,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:36,420 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-18 16:16:36,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 16:16:36,420 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-18 16:16:36,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 16:16:36,421 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:36,421 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:36,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 16:16:36,422 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:36,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:36,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-18 16:16:36,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:36,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211426232] [2020-08-18 16:16:36,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-18 16:16:36,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211426232] [2020-08-18 16:16:36,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:36,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 16:16:36,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531149679] [2020-08-18 16:16:36,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 16:16:36,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:36,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 16:16:36,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-18 16:16:36,696 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-18 16:16:36,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:36,853 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-18 16:16:36,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 16:16:36,853 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-18 16:16:36,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:36,855 INFO L225 Difference]: With dead ends: 46 [2020-08-18 16:16:36,855 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 16:16:36,856 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 [2020-08-18 16:16:36,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 16:16:36,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-18 16:16:36,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 16:16:36,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-18 16:16:36,862 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-18 16:16:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:36,863 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-18 16:16:36,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 16:16:36,863 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-18 16:16:36,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 16:16:36,864 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:36,864 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:36,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 16:16:36,865 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:36,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:36,865 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-18 16:16:36,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:36,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376557665] [2020-08-18 16:16:36,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:36,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-18 16:16:37,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376557665] [2020-08-18 16:16:37,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:37,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 16:16:37,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970108428] [2020-08-18 16:16:37,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 16:16:37,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:37,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 16:16:37,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-18 16:16:37,203 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-18 16:16:37,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:37,360 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-18 16:16:37,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 16:16:37,361 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-18 16:16:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:37,362 INFO L225 Difference]: With dead ends: 49 [2020-08-18 16:16:37,363 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 16:16:37,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-18 16:16:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 16:16:37,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-18 16:16:37,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 16:16:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-18 16:16:37,370 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-18 16:16:37,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:37,370 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-18 16:16:37,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 16:16:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-18 16:16:37,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 16:16:37,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:37,372 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:37,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 16:16:37,373 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:37,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:37,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-18 16:16:37,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:37,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357368049] [2020-08-18 16:16:37,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-18 16:16:37,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357368049] [2020-08-18 16:16:37,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:37,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 16:16:37,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192954332] [2020-08-18 16:16:37,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 16:16:37,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:37,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 16:16:37,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-18 16:16:37,793 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-18 16:16:37,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:37,970 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-18 16:16:37,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 16:16:37,970 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-18 16:16:37,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:37,972 INFO L225 Difference]: With dead ends: 52 [2020-08-18 16:16:37,973 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 16:16:37,974 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 [2020-08-18 16:16:37,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 16:16:37,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-18 16:16:37,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 16:16:37,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-18 16:16:37,981 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-18 16:16:37,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:37,981 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-18 16:16:37,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 16:16:37,981 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-18 16:16:37,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 16:16:37,982 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:37,982 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:37,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 16:16:37,982 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:37,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:37,983 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-08-18 16:16:37,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:37,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808316312] [2020-08-18 16:16:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:38,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:38,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:38,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:38,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:38,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:38,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:38,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:38,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:38,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:38,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:38,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:38,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:38,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-18 16:16:38,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808316312] [2020-08-18 16:16:38,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:38,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 16:16:38,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690139367] [2020-08-18 16:16:38,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 16:16:38,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:38,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 16:16:38,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-18 16:16:38,457 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-18 16:16:38,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:38,678 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-18 16:16:38,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 16:16:38,678 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-18 16:16:38,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:38,679 INFO L225 Difference]: With dead ends: 55 [2020-08-18 16:16:38,680 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 16:16:38,682 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 [2020-08-18 16:16:38,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 16:16:38,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-18 16:16:38,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-18 16:16:38,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-18 16:16:38,693 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-18 16:16:38,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:38,693 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-18 16:16:38,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 16:16:38,693 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-18 16:16:38,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 16:16:38,699 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:38,699 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:38,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 16:16:38,700 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:38,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:38,701 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-08-18 16:16:38,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:38,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354034647] [2020-08-18 16:16:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:38,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:38,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:38,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:38,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:38,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:38,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:39,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:39,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:39,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:39,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:39,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:39,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:39,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:39,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-18 16:16:39,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354034647] [2020-08-18 16:16:39,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:39,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 16:16:39,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119736254] [2020-08-18 16:16:39,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 16:16:39,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:39,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 16:16:39,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-18 16:16:39,327 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-18 16:16:39,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:39,527 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-18 16:16:39,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 16:16:39,527 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-18 16:16:39,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:39,529 INFO L225 Difference]: With dead ends: 58 [2020-08-18 16:16:39,529 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 16:16:39,530 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 [2020-08-18 16:16:39,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 16:16:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-18 16:16:39,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 16:16:39,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-18 16:16:39,542 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-18 16:16:39,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:39,542 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-18 16:16:39,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 16:16:39,543 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-18 16:16:39,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 16:16:39,544 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:39,545 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:39,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 16:16:39,545 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:39,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:39,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-08-18 16:16:39,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:39,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315410425] [2020-08-18 16:16:39,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:39,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:39,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:39,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:39,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:39,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:39,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:39,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:39,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:39,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:39,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:39,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:39,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:39,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-18 16:16:40,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315410425] [2020-08-18 16:16:40,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:40,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 16:16:40,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167157901] [2020-08-18 16:16:40,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 16:16:40,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:40,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 16:16:40,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-18 16:16:40,174 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-18 16:16:40,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:40,384 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-18 16:16:40,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 16:16:40,385 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-18 16:16:40,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:40,387 INFO L225 Difference]: With dead ends: 61 [2020-08-18 16:16:40,387 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 16:16:40,388 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 [2020-08-18 16:16:40,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 16:16:40,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-18 16:16:40,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 16:16:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-18 16:16:40,395 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-18 16:16:40,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:40,396 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-18 16:16:40,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 16:16:40,396 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-18 16:16:40,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 16:16:40,397 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:40,397 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:40,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 16:16:40,398 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:40,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:40,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-08-18 16:16:40,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:40,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787972443] [2020-08-18 16:16:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:40,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-18 16:16:41,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787972443] [2020-08-18 16:16:41,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:41,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 16:16:41,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167664978] [2020-08-18 16:16:41,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 16:16:41,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:41,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 16:16:41,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-18 16:16:41,063 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-18 16:16:41,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:41,280 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-18 16:16:41,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 16:16:41,280 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-18 16:16:41,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:41,281 INFO L225 Difference]: With dead ends: 64 [2020-08-18 16:16:41,282 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 16:16:41,283 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 [2020-08-18 16:16:41,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 16:16:41,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-18 16:16:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-18 16:16:41,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-18 16:16:41,288 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-18 16:16:41,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:41,289 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-18 16:16:41,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 16:16:41,289 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-18 16:16:41,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-18 16:16:41,290 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:41,290 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:41,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 16:16:41,290 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:41,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:41,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-08-18 16:16:41,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:41,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932702502] [2020-08-18 16:16:41,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:41,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:41,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:41,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:41,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:41,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:41,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:41,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:41,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:41,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:41,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:41,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:41,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:41,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:41,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:41,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:41,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:41,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-18 16:16:42,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932702502] [2020-08-18 16:16:42,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:42,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 16:16:42,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418320955] [2020-08-18 16:16:42,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 16:16:42,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:42,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 16:16:42,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-18 16:16:42,033 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2020-08-18 16:16:42,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:42,291 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-18 16:16:42,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 16:16:42,292 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-08-18 16:16:42,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:42,293 INFO L225 Difference]: With dead ends: 67 [2020-08-18 16:16:42,293 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 16:16:42,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 16:16:42,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 16:16:42,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-18 16:16:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-18 16:16:42,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-18 16:16:42,311 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-18 16:16:42,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:42,311 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-18 16:16:42,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 16:16:42,313 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-18 16:16:42,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-18 16:16:42,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:42,315 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:42,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 16:16:42,316 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:42,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:42,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2020-08-18 16:16:42,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:42,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375245650] [2020-08-18 16:16:42,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:42,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:42,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:42,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:42,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:42,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:42,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:42,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:42,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:42,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:42,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:42,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:42,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:42,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:42,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:42,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:42,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:42,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:42,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-18 16:16:43,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375245650] [2020-08-18 16:16:43,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:43,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 16:16:43,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000541295] [2020-08-18 16:16:43,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 16:16:43,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:43,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 16:16:43,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-18 16:16:43,021 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-18 16:16:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:43,276 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-18 16:16:43,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 16:16:43,277 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-18 16:16:43,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:43,278 INFO L225 Difference]: With dead ends: 70 [2020-08-18 16:16:43,278 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 16:16:43,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 16:16:43,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 16:16:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-18 16:16:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-18 16:16:43,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-18 16:16:43,285 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-18 16:16:43,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:43,285 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-18 16:16:43,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 16:16:43,285 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-18 16:16:43,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-18 16:16:43,286 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:43,287 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:43,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 16:16:43,287 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:43,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:43,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2020-08-18 16:16:43,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:43,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270307660] [2020-08-18 16:16:43,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:43,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:43,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:43,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:43,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:43,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:43,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:43,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:43,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:43,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:43,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:43,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:43,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:43,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:43,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:43,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:43,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:43,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:43,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:43,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:43,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-18 16:16:44,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270307660] [2020-08-18 16:16:44,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:44,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 16:16:44,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839558527] [2020-08-18 16:16:44,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 16:16:44,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:44,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 16:16:44,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-18 16:16:44,016 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2020-08-18 16:16:44,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:44,321 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-18 16:16:44,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 16:16:44,322 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-08-18 16:16:44,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:44,323 INFO L225 Difference]: With dead ends: 73 [2020-08-18 16:16:44,323 INFO L226 Difference]: Without dead ends: 69 [2020-08-18 16:16:44,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-08-18 16:16:44,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-18 16:16:44,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-18 16:16:44,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 16:16:44,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-18 16:16:44,336 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-18 16:16:44,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:44,336 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-18 16:16:44,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 16:16:44,336 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-18 16:16:44,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 16:16:44,338 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:44,339 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:44,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 16:16:44,339 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:44,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:44,339 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2020-08-18 16:16:44,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:44,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939931650] [2020-08-18 16:16:44,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:44,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:44,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:44,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:44,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:44,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:44,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:44,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:44,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:44,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:44,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:44,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:44,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:44,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:44,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:44,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:44,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:44,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:45,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:45,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:45,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-18 16:16:45,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939931650] [2020-08-18 16:16:45,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:45,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 16:16:45,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379998175] [2020-08-18 16:16:45,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 16:16:45,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:45,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 16:16:45,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-18 16:16:45,319 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2020-08-18 16:16:45,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:45,665 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-18 16:16:45,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 16:16:45,665 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2020-08-18 16:16:45,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:45,666 INFO L225 Difference]: With dead ends: 76 [2020-08-18 16:16:45,666 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 16:16:45,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-08-18 16:16:45,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 16:16:45,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-18 16:16:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 16:16:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-18 16:16:45,672 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-18 16:16:45,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:45,673 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-18 16:16:45,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 16:16:45,673 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-18 16:16:45,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-18 16:16:45,674 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:45,674 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:45,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 16:16:45,675 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:45,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:45,675 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2020-08-18 16:16:45,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:45,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376528282] [2020-08-18 16:16:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:45,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:45,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:45,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:45,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:45,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:45,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:45,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:45,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:45,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:46,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:46,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:46,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:46,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:46,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:46,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:46,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:46,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:46,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:46,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:46,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:46,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:46,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:46,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-18 16:16:46,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376528282] [2020-08-18 16:16:46,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:46,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 16:16:46,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241101046] [2020-08-18 16:16:46,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 16:16:46,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:46,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 16:16:46,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-18 16:16:46,640 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2020-08-18 16:16:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:47,046 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-18 16:16:47,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 16:16:47,047 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-08-18 16:16:47,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:47,048 INFO L225 Difference]: With dead ends: 79 [2020-08-18 16:16:47,052 INFO L226 Difference]: Without dead ends: 75 [2020-08-18 16:16:47,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-08-18 16:16:47,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-18 16:16:47,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-18 16:16:47,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 16:16:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-18 16:16:47,068 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-18 16:16:47,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:47,069 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-18 16:16:47,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 16:16:47,069 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-18 16:16:47,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-18 16:16:47,072 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:47,072 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:47,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 16:16:47,073 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:47,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:47,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2020-08-18 16:16:47,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:47,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840079153] [2020-08-18 16:16:47,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:16:47,126 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:16:47,126 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:16:47,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 16:16:47,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:16:47 BoogieIcfgContainer [2020-08-18 16:16:47,209 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:16:47,214 INFO L168 Benchmark]: Toolchain (without parser) took 14343.42 ms. Allocated memory was 140.0 MB in the beginning and 419.4 MB in the end (delta: 279.4 MB). Free memory was 103.0 MB in the beginning and 117.2 MB in the end (delta: -14.2 MB). Peak memory consumption was 265.2 MB. Max. memory is 7.1 GB. [2020-08-18 16:16:47,215 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 16:16:47,216 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.97 ms. Allocated memory is still 140.0 MB. Free memory was 102.8 MB in the beginning and 93.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-18 16:16:47,218 INFO L168 Benchmark]: Boogie Preprocessor took 30.49 ms. Allocated memory is still 140.0 MB. Free memory was 93.0 MB in the beginning and 91.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-18 16:16:47,219 INFO L168 Benchmark]: RCFGBuilder took 410.54 ms. Allocated memory was 140.0 MB in the beginning and 207.1 MB in the end (delta: 67.1 MB). Free memory was 91.7 MB in the beginning and 174.7 MB in the end (delta: -82.9 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-18 16:16:47,220 INFO L168 Benchmark]: TraceAbstraction took 13658.92 ms. Allocated memory was 207.1 MB in the beginning and 419.4 MB in the end (delta: 212.3 MB). Free memory was 174.0 MB in the beginning and 117.2 MB in the end (delta: 56.8 MB). Peak memory consumption was 269.1 MB. Max. memory is 7.1 GB. [2020-08-18 16:16:47,235 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 237.97 ms. Allocated memory is still 140.0 MB. Free memory was 102.8 MB in the beginning and 93.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.49 ms. Allocated memory is still 140.0 MB. Free memory was 93.0 MB in the beginning and 91.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 410.54 ms. Allocated memory was 140.0 MB in the beginning and 207.1 MB in the end (delta: 67.1 MB). Free memory was 91.7 MB in the beginning and 174.7 MB in the end (delta: -82.9 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13658.92 ms. Allocated memory was 207.1 MB in the beginning and 419.4 MB in the end (delta: 212.3 MB). Free memory was 174.0 MB in the beginning and 117.2 MB in the end (delta: 56.8 MB). Peak memory consumption was 269.1 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 = 20; [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 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); [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: 13.4s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 243 SDtfs, 523 SDslu, 1120 SDs, 0 SdLazy, 809 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 940 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 460 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2470 ImplicationChecksByTransitivity, 5.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, 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, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 8.5s InterpolantComputationTime, 1533 NumberOfCodeBlocks, 1533 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1380 ConstructedInterpolants, 0 QuantifiedInterpolants, 301200 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 1 PerfectInterpolantSequences, 3800/7600 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...