/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_10x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 05:59:58,159 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-19 05:59:58,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 05:59:58,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 05:59:58,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 05:59:58,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 05:59:58,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 05:59:58,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 05:59:58,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 05:59:58,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 05:59:58,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 05:59:58,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 05:59:58,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 05:59:58,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 05:59:58,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 05:59:58,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 05:59:58,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 05:59:58,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 05:59:58,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 05:59:58,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 05:59:58,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 05:59:58,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 05:59:58,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 05:59:58,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 05:59:58,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 05:59:58,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 05:59:58,223 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 [2020-08-19 05:59:58,270 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 05:59:58,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 05:59:58,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 05:59:58,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 05:59:58,272 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 05:59:58,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 05:59:58,272 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 05:59:58,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 05:59:58,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 05:59:58,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 05:59:58,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 05:59:58,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 05:59:58,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 05:59:58,276 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 05:59:58,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 05:59:58,277 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 05:59:58,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 05:59:58,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 05:59:58,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 05:59:58,279 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 05:59:58,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 05:59:58,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 05:59:58,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 05:59:58,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 05:59:58,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 05:59:58,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 05:59:58,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 05:59:58,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 05:59:58,280 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 05:59:58,281 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; [2020-08-19 05:59:58,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 05:59:58,599 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 05:59:58,603 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 05:59:58,604 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 05:59:58,605 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 05:59:58,606 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-2.c [2020-08-19 05:59:58,672 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40fbdab32/e26fe9d7a75e43ed871ba2d2ee641faa/FLAG5c33e622c [2020-08-19 05:59:59,130 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 05:59:59,130 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_10x0-2.c [2020-08-19 05:59:59,137 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40fbdab32/e26fe9d7a75e43ed871ba2d2ee641faa/FLAG5c33e622c [2020-08-19 05:59:59,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40fbdab32/e26fe9d7a75e43ed871ba2d2ee641faa [2020-08-19 05:59:59,547 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 05:59:59,549 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 05:59:59,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 05:59:59,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 05:59:59,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 05:59:59,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:59:59" (1/1) ... [2020-08-19 05:59:59,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a4700e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:59, skipping insertion in model container [2020-08-19 05:59:59,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:59:59" (1/1) ... [2020-08-19 05:59:59,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 05:59:59,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 05:59:59,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:59:59,766 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 05:59:59,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:59:59,791 INFO L208 MainTranslator]: Completed translation [2020-08-19 05:59:59,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:59 WrapperNode [2020-08-19 05:59:59,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 05:59:59,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 05:59:59,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 05:59:59,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 05:59:59,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:59" (1/1) ... [2020-08-19 05:59:59,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:59" (1/1) ... [2020-08-19 05:59:59,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:59" (1/1) ... [2020-08-19 05:59:59,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:59" (1/1) ... [2020-08-19 05:59:59,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:59" (1/1) ... [2020-08-19 05:59:59,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:59" (1/1) ... [2020-08-19 05:59:59,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:59" (1/1) ... [2020-08-19 05:59:59,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 05:59:59,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 05:59:59,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 05:59:59,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 05:59:59,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:59" (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 [2020-08-19 05:59:59,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 05:59:59,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 05:59:59,976 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-19 05:59:59,976 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 05:59:59,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 05:59:59,976 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-19 05:59:59,977 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 05:59:59,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 05:59:59,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:00:00,145 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:00:00,145 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 06:00:00,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:00:00 BoogieIcfgContainer [2020-08-19 06:00:00,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:00:00,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:00:00,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:00:00,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:00:00,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 05:59:59" (1/3) ... [2020-08-19 06:00:00,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd25f15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:00:00, skipping insertion in model container [2020-08-19 06:00:00,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:59" (2/3) ... [2020-08-19 06:00:00,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd25f15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:00:00, skipping insertion in model container [2020-08-19 06:00:00,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:00:00" (3/3) ... [2020-08-19 06:00:00,158 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_10x0-2.c [2020-08-19 06:00:00,170 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:00:00,177 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:00:00,191 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:00:00,213 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:00:00,213 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:00:00,213 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:00:00,213 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:00:00,213 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:00:00,213 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:00:00,214 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:00:00,214 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:00:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-19 06:00:00,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 06:00:00,236 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:00,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:00,237 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:00,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:00,243 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-19 06:00:00,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:00,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201383050] [2020-08-19 06:00:00,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:00,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:00,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:00:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:00,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201383050] [2020-08-19 06:00:00,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:00,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:00:00,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327131136] [2020-08-19 06:00:00,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:00:00,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:00,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:00:00,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:00:00,673 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-19 06:00:00,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:00,798 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-19 06:00:00,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:00:00,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 06:00:00,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:00,812 INFO L225 Difference]: With dead ends: 30 [2020-08-19 06:00:00,812 INFO L226 Difference]: Without dead ends: 18 [2020-08-19 06:00:00,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:00:00,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-19 06:00:00,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-19 06:00:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 06:00:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-19 06:00:00,857 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-19 06:00:00,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:00,858 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-19 06:00:00,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:00:00,859 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-19 06:00:00,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 06:00:00,861 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:00,861 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:00,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:00:00,862 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:00,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:00,863 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-19 06:00:00,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:00,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75418426] [2020-08-19 06:00:00,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:00,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:00,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:00:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:00,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:00,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 06:00:00,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75418426] [2020-08-19 06:00:00,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:00:00,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 06:00:00,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461323096] [2020-08-19 06:00:00,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:00:00,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:00,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:00:00,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:00:00,993 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-19 06:00:01,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:01,053 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-19 06:00:01,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:00:01,054 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-19 06:00:01,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:01,055 INFO L225 Difference]: With dead ends: 25 [2020-08-19 06:00:01,056 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 06:00:01,057 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 [2020-08-19 06:00:01,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 06:00:01,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-19 06:00:01,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 06:00:01,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-19 06:00:01,065 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-19 06:00:01,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:01,065 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-19 06:00:01,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:00:01,066 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-19 06:00:01,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 06:00:01,067 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:01,067 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:01,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:00:01,068 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:01,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:01,068 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-19 06:00:01,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:01,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687720449] [2020-08-19 06:00:01,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:01,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:01,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:00:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:01,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:01,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 06:00:01,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687720449] [2020-08-19 06:00:01,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:00:01,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:00:01,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623602783] [2020-08-19 06:00:01,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:00:01,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:01,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:00:01,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:00:01,246 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-19 06:00:01,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:01,324 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-19 06:00:01,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:00:01,325 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-19 06:00:01,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:01,327 INFO L225 Difference]: With dead ends: 28 [2020-08-19 06:00:01,327 INFO L226 Difference]: Without dead ends: 24 [2020-08-19 06:00:01,328 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 [2020-08-19 06:00:01,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-19 06:00:01,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-19 06:00:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-19 06:00:01,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-19 06:00:01,336 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-19 06:00:01,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:01,336 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-19 06:00:01,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:00:01,337 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-19 06:00:01,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 06:00:01,338 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:01,338 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:01,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:00:01,339 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:01,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:01,339 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-19 06:00:01,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:01,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048857704] [2020-08-19 06:00:01,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:01,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:01,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:01,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:00:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:01,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:01,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:01,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-19 06:00:01,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048857704] [2020-08-19 06:00:01,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:00:01,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:00:01,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674294889] [2020-08-19 06:00:01,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:00:01,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:01,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:00:01,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:00:01,591 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-19 06:00:01,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:01,688 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-19 06:00:01,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:00:01,689 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-19 06:00:01,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:01,691 INFO L225 Difference]: With dead ends: 31 [2020-08-19 06:00:01,692 INFO L226 Difference]: Without dead ends: 27 [2020-08-19 06:00:01,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:00:01,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-19 06:00:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-19 06:00:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-19 06:00:01,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-19 06:00:01,702 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-19 06:00:01,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:01,706 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-19 06:00:01,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:00:01,707 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-19 06:00:01,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-19 06:00:01,709 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:01,710 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:01,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:00:01,710 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:01,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:01,711 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-19 06:00:01,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:01,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600402107] [2020-08-19 06:00:01,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:01,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:01,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:00:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:01,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:01,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:01,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:01,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:01,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-19 06:00:01,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600402107] [2020-08-19 06:00:01,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:00:01,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:00:01,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227192970] [2020-08-19 06:00:01,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:00:01,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:01,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:00:01,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:00:01,907 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-19 06:00:01,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:01,997 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-19 06:00:01,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:00:01,997 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-19 06:00:01,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:01,999 INFO L225 Difference]: With dead ends: 34 [2020-08-19 06:00:01,999 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 06:00:02,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:00:02,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 06:00:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 06:00:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 06:00:02,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-19 06:00:02,007 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-19 06:00:02,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:02,008 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-19 06:00:02,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:00:02,008 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-19 06:00:02,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-19 06:00:02,009 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:02,010 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:02,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:00:02,010 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:02,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:02,011 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-19 06:00:02,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:02,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807966162] [2020-08-19 06:00:02,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:00:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-19 06:00:02,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807966162] [2020-08-19 06:00:02,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:00:02,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:00:02,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102954762] [2020-08-19 06:00:02,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:00:02,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:02,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:00:02,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:00:02,242 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-19 06:00:02,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:02,332 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-19 06:00:02,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:00:02,332 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-19 06:00:02,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:02,334 INFO L225 Difference]: With dead ends: 37 [2020-08-19 06:00:02,334 INFO L226 Difference]: Without dead ends: 33 [2020-08-19 06:00:02,335 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 [2020-08-19 06:00:02,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-19 06:00:02,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-19 06:00:02,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 06:00:02,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-19 06:00:02,341 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-19 06:00:02,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:02,342 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-19 06:00:02,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:00:02,342 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-19 06:00:02,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-19 06:00:02,344 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:02,344 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:02,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:00:02,344 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:02,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:02,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-19 06:00:02,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:02,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380281026] [2020-08-19 06:00:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:00:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-19 06:00:02,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380281026] [2020-08-19 06:00:02,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:00:02,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:00:02,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593328000] [2020-08-19 06:00:02,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:00:02,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:02,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:00:02,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:00:02,571 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-19 06:00:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:02,676 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-19 06:00:02,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 06:00:02,677 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-19 06:00:02,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:02,678 INFO L225 Difference]: With dead ends: 40 [2020-08-19 06:00:02,678 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 06:00:02,679 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 [2020-08-19 06:00:02,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 06:00:02,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-19 06:00:02,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-19 06:00:02,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-19 06:00:02,686 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-19 06:00:02,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:02,686 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-19 06:00:02,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:00:02,687 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-19 06:00:02,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 06:00:02,688 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:02,688 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:02,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:00:02,689 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:02,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:02,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-19 06:00:02,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:02,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297624455] [2020-08-19 06:00:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:00:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-19 06:00:02,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297624455] [2020-08-19 06:00:02,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:00:02,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 06:00:02,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123787598] [2020-08-19 06:00:02,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 06:00:02,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:02,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 06:00:02,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:00:02,962 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-19 06:00:03,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:03,092 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-19 06:00:03,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 06:00:03,092 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-19 06:00:03,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:03,093 INFO L225 Difference]: With dead ends: 43 [2020-08-19 06:00:03,094 INFO L226 Difference]: Without dead ends: 39 [2020-08-19 06:00:03,094 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 [2020-08-19 06:00:03,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-19 06:00:03,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-19 06:00:03,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 06:00:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-19 06:00:03,104 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-19 06:00:03,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:03,104 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-19 06:00:03,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 06:00:03,104 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-19 06:00:03,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 06:00:03,105 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:03,105 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:03,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:00:03,106 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:03,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:03,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-19 06:00:03,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:03,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787751544] [2020-08-19 06:00:03,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:00:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-19 06:00:03,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787751544] [2020-08-19 06:00:03,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:00:03,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 06:00:03,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303144913] [2020-08-19 06:00:03,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 06:00:03,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:03,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 06:00:03,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:00:03,394 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-19 06:00:03,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:03,530 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-19 06:00:03,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 06:00:03,530 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-19 06:00:03,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:03,532 INFO L225 Difference]: With dead ends: 46 [2020-08-19 06:00:03,532 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 06:00:03,533 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 [2020-08-19 06:00:03,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 06:00:03,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-19 06:00:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 06:00:03,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-19 06:00:03,539 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-19 06:00:03,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:03,540 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-19 06:00:03,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 06:00:03,540 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-19 06:00:03,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-19 06:00:03,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:03,542 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:03,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:00:03,542 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:03,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:03,543 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-19 06:00:03,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:03,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312357311] [2020-08-19 06:00:03,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:00:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:00:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-19 06:00:03,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312357311] [2020-08-19 06:00:03,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:00:03,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 06:00:03,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717699941] [2020-08-19 06:00:03,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 06:00:03,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:03,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 06:00:03,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:00:03,936 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-19 06:00:04,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:04,078 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-19 06:00:04,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 06:00:04,080 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-19 06:00:04,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:04,081 INFO L225 Difference]: With dead ends: 49 [2020-08-19 06:00:04,082 INFO L226 Difference]: Without dead ends: 45 [2020-08-19 06:00:04,083 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 [2020-08-19 06:00:04,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-19 06:00:04,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-19 06:00:04,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 06:00:04,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-19 06:00:04,096 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-19 06:00:04,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:04,096 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-19 06:00:04,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 06:00:04,096 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-19 06:00:04,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-19 06:00:04,100 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:04,100 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:04,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:00:04,101 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:04,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:04,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-19 06:00:04,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:04,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726847134] [2020-08-19 06:00:04,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 06:00:04,134 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 06:00:04,134 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 06:00:04,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:00:04,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:00:04 BoogieIcfgContainer [2020-08-19 06:00:04,189 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:00:04,194 INFO L168 Benchmark]: Toolchain (without parser) took 4642.77 ms. Allocated memory was 146.8 MB in the beginning and 282.6 MB in the end (delta: 135.8 MB). Free memory was 102.8 MB in the beginning and 214.0 MB in the end (delta: -111.2 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-08-19 06:00:04,195 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-08-19 06:00:04,196 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.33 ms. Allocated memory is still 146.8 MB. Free memory was 102.4 MB in the beginning and 93.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-08-19 06:00:04,201 INFO L168 Benchmark]: Boogie Preprocessor took 26.49 ms. Allocated memory is still 146.8 MB. Free memory was 93.2 MB in the beginning and 91.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-19 06:00:04,203 INFO L168 Benchmark]: RCFGBuilder took 330.13 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 91.9 MB in the beginning and 169.7 MB in the end (delta: -77.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-19 06:00:04,204 INFO L168 Benchmark]: TraceAbstraction took 4039.02 ms. Allocated memory was 202.4 MB in the beginning and 282.6 MB in the end (delta: 80.2 MB). Free memory was 169.7 MB in the beginning and 214.0 MB in the end (delta: -44.3 MB). Peak memory consumption was 35.9 MB. Max. memory is 7.1 GB. [2020-08-19 06:00:04,214 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.33 ms. Allocated memory is still 146.8 MB. Free memory was 102.4 MB in the beginning and 93.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.49 ms. Allocated memory is still 146.8 MB. Free memory was 93.2 MB in the beginning and 91.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 330.13 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 91.9 MB in the beginning and 169.7 MB in the end (delta: -77.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4039.02 ms. Allocated memory was 202.4 MB in the beginning and 282.6 MB in the end (delta: 80.2 MB). Free memory was 169.7 MB in the beginning and 214.0 MB in the end (delta: -44.3 MB). Peak memory consumption was 35.9 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 = 10; [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 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); [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: 3.9s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 123 SDtfs, 163 SDslu, 394 SDs, 0 SdLazy, 296 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 473 NumberOfCodeBlocks, 473 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 390 ConstructedInterpolants, 0 QuantifiedInterpolants, 43800 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 450/900 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...