/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=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_15x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:04:44,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:04:44,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:04:44,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:04:44,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:04:44,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:04:44,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:04:44,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:04:44,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:04:44,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:04:44,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:04:44,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:04:44,747 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:04:44,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:04:44,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:04:44,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:04:44,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:04:44,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:04:44,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:04:44,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:04:44,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:04:44,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:04:44,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:04:44,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:04:44,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:04:44,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:04:44,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:04:44,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:04:44,774 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 17:04:44,798 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:04:44,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:04:44,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:04:44,800 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:04:44,800 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:04:44,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:04:44,800 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:04:44,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:04:44,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:04:44,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:04:44,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:04:44,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:04:44,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:04:44,804 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:04:44,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:04:44,804 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:04:44,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:04:44,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:04:44,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:04:44,805 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:04:44,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:04:44,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:04:44,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:04:44,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:04:44,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:04:44,808 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:04:44,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:04:44,808 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:04:44,809 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:04:44,809 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=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 17:04:45,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:04:45,169 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:04:45,175 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:04:45,176 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:04:45,177 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:04:45,178 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2020-08-18 17:04:45,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1de26cecc/95d1022484544e6790b71f5031bf0745/FLAG9849c2c43 [2020-08-18 17:04:45,760 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:04:45,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2020-08-18 17:04:45,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1de26cecc/95d1022484544e6790b71f5031bf0745/FLAG9849c2c43 [2020-08-18 17:04:46,133 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1de26cecc/95d1022484544e6790b71f5031bf0745 [2020-08-18 17:04:46,145 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:04:46,147 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:04:46,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:04:46,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:04:46,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:04:46,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:04:46" (1/1) ... [2020-08-18 17:04:46,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fd2a1d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:46, skipping insertion in model container [2020-08-18 17:04:46,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:04:46" (1/1) ... [2020-08-18 17:04:46,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:04:46,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:04:46,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:04:46,351 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:04:46,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:04:46,377 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:04:46,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:46 WrapperNode [2020-08-18 17:04:46,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:04:46,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:04:46,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:04:46,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:04:46,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:46" (1/1) ... [2020-08-18 17:04:46,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:46" (1/1) ... [2020-08-18 17:04:46,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:46" (1/1) ... [2020-08-18 17:04:46,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:46" (1/1) ... [2020-08-18 17:04:46,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:46" (1/1) ... [2020-08-18 17:04:46,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:46" (1/1) ... [2020-08-18 17:04:46,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:46" (1/1) ... [2020-08-18 17:04:46,491 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:04:46,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:04:46,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:04:46,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:04:46,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:46" (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 17:04:46,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:04:46,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:04:46,557 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-18 17:04:46,557 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:04:46,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:04:46,558 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-18 17:04:46,558 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:04:46,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:04:46,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:04:46,727 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:04:46,728 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 17:04:46,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:04:46 BoogieIcfgContainer [2020-08-18 17:04:46,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:04:46,733 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:04:46,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:04:46,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:04:46,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:04:46" (1/3) ... [2020-08-18 17:04:46,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc37b14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:04:46, skipping insertion in model container [2020-08-18 17:04:46,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:46" (2/3) ... [2020-08-18 17:04:46,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc37b14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:04:46, skipping insertion in model container [2020-08-18 17:04:46,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:04:46" (3/3) ... [2020-08-18 17:04:46,743 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-2.c [2020-08-18 17:04:46,755 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:04:46,763 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:04:46,778 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:04:46,829 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:04:46,829 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:04:46,829 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:04:46,829 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:04:46,833 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:04:46,833 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:04:46,833 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:04:46,833 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:04:46,866 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 17:04:46,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 17:04:46,879 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:46,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:04:46,881 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:46,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:46,888 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-18 17:04:46,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:46,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261970602] [2020-08-18 17:04:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:47,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:47,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:47,181 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 17:04:47,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261970602] [2020-08-18 17:04:47,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:04:47,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:04:47,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752537211] [2020-08-18 17:04:47,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:04:47,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:47,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:04:47,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:04:47,226 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-18 17:04:47,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:47,359 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-18 17:04:47,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:04:47,361 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 17:04:47,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:47,377 INFO L225 Difference]: With dead ends: 30 [2020-08-18 17:04:47,377 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 17:04:47,383 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 17:04:47,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 17:04:47,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 17:04:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 17:04:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 17:04:47,432 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-18 17:04:47,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:47,433 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 17:04:47,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:04:47,434 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 17:04:47,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 17:04:47,436 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:47,436 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 17:04:47,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:04:47,437 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:47,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:47,438 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-18 17:04:47,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:47,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247210015] [2020-08-18 17:04:47,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:47,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:47,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:47,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:47,567 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 17:04:47,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247210015] [2020-08-18 17:04:47,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:47,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 17:04:47,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290064468] [2020-08-18 17:04:47,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:04:47,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:47,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:04:47,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:04:47,571 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-18 17:04:47,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:47,640 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-18 17:04:47,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 17:04:47,641 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-18 17:04:47,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:47,642 INFO L225 Difference]: With dead ends: 25 [2020-08-18 17:04:47,642 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 17:04:47,644 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 17:04:47,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 17:04:47,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 17:04:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 17:04:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 17:04:47,652 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-18 17:04:47,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:47,652 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 17:04:47,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:04:47,653 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 17:04:47,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 17:04:47,654 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:47,654 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 17:04:47,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:04:47,655 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:47,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:47,655 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-18 17:04:47,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:47,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395272149] [2020-08-18 17:04:47,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:47,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:47,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:47,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:47,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:47,865 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 17:04:47,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395272149] [2020-08-18 17:04:47,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:47,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 17:04:47,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378240742] [2020-08-18 17:04:47,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 17:04:47,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:47,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 17:04:47,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:04:47,868 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-18 17:04:47,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:47,938 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-18 17:04:47,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 17:04:47,939 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-18 17:04:47,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:47,941 INFO L225 Difference]: With dead ends: 28 [2020-08-18 17:04:47,941 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 17:04:47,942 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 17:04:47,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 17:04:47,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-18 17:04:47,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 17:04:47,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-18 17:04:47,950 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-18 17:04:47,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:47,951 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-18 17:04:47,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 17:04:47,951 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-18 17:04:47,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 17:04:47,953 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:47,953 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 17:04:47,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:04:47,953 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:47,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:47,954 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-18 17:04:47,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:47,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056392233] [2020-08-18 17:04:47,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,146 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 17:04:48,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056392233] [2020-08-18 17:04:48,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:48,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 17:04:48,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833148638] [2020-08-18 17:04:48,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:04:48,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:48,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:04:48,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:04:48,163 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-18 17:04:48,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:48,262 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-18 17:04:48,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 17:04:48,263 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-18 17:04:48,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:48,264 INFO L225 Difference]: With dead ends: 31 [2020-08-18 17:04:48,265 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 17:04:48,265 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 17:04:48,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 17:04:48,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-18 17:04:48,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 17:04:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-18 17:04:48,272 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-18 17:04:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:48,273 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-18 17:04:48,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:04:48,273 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-18 17:04:48,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 17:04:48,275 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:48,275 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 17:04:48,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:04:48,275 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:48,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:48,276 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-18 17:04:48,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:48,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340314183] [2020-08-18 17:04:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,532 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 17:04:48,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340314183] [2020-08-18 17:04:48,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:48,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 17:04:48,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137347676] [2020-08-18 17:04:48,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 17:04:48,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:48,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 17:04:48,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:04:48,535 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-18 17:04:48,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:48,634 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-18 17:04:48,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 17:04:48,635 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-18 17:04:48,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:48,636 INFO L225 Difference]: With dead ends: 34 [2020-08-18 17:04:48,637 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 17:04:48,637 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 17:04:48,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 17:04:48,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 17:04:48,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 17:04:48,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-18 17:04:48,645 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-18 17:04:48,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:48,645 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-18 17:04:48,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 17:04:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-18 17:04:48,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 17:04:48,647 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:48,647 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 17:04:48,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:04:48,648 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:48,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:48,649 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-18 17:04:48,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:48,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003193928] [2020-08-18 17:04:48,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:48,865 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 17:04:48,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003193928] [2020-08-18 17:04:48,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:48,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 17:04:48,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340209349] [2020-08-18 17:04:48,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:04:48,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:48,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:04:48,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:04:48,868 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-18 17:04:48,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:48,960 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-18 17:04:48,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:04:48,960 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-18 17:04:48,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:48,962 INFO L225 Difference]: With dead ends: 37 [2020-08-18 17:04:48,962 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 17:04:48,963 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 17:04:48,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 17:04:48,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-18 17:04:48,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 17:04:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-18 17:04:48,970 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-18 17:04:48,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:48,971 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-18 17:04:48,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:04:48,971 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-18 17:04:48,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 17:04:48,973 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:48,973 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 17:04:48,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:04:48,974 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:48,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:48,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-18 17:04:48,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:48,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132279323] [2020-08-18 17:04:48,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,204 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 17:04:49,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132279323] [2020-08-18 17:04:49,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:49,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 17:04:49,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261485167] [2020-08-18 17:04:49,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 17:04:49,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:49,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 17:04:49,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:04:49,207 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-18 17:04:49,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:49,309 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-18 17:04:49,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 17:04:49,309 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-18 17:04:49,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:49,311 INFO L225 Difference]: With dead ends: 40 [2020-08-18 17:04:49,311 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 17:04:49,312 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 17:04:49,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 17:04:49,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-18 17:04:49,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 17:04:49,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-18 17:04:49,318 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-18 17:04:49,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:49,319 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-18 17:04:49,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 17:04:49,319 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-18 17:04:49,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 17:04:49,320 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:49,320 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 17:04:49,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:04:49,321 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:49,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:49,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-18 17:04:49,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:49,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103961006] [2020-08-18 17:04:49,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,548 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 17:04:49,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103961006] [2020-08-18 17:04:49,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:49,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 17:04:49,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332707786] [2020-08-18 17:04:49,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 17:04:49,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:49,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 17:04:49,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-18 17:04:49,551 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-18 17:04:49,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:49,665 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-18 17:04:49,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 17:04:49,666 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-18 17:04:49,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:49,667 INFO L225 Difference]: With dead ends: 43 [2020-08-18 17:04:49,667 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 17:04:49,668 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 17:04:49,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 17:04:49,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-18 17:04:49,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 17:04:49,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-18 17:04:49,674 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-18 17:04:49,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:49,675 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-18 17:04:49,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 17:04:49,675 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-18 17:04:49,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 17:04:49,676 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:49,677 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 17:04:49,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:04:49,677 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:49,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:49,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-18 17:04:49,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:49,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427513379] [2020-08-18 17:04:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:49,940 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 17:04:49,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427513379] [2020-08-18 17:04:49,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:49,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 17:04:49,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347582602] [2020-08-18 17:04:49,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 17:04:49,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:49,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 17:04:49,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-18 17:04:49,943 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-18 17:04:50,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:50,092 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-18 17:04:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 17:04:50,093 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-18 17:04:50,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:50,094 INFO L225 Difference]: With dead ends: 46 [2020-08-18 17:04:50,094 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 17:04:50,095 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 17:04:50,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 17:04:50,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-18 17:04:50,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 17:04:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-18 17:04:50,102 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-18 17:04:50,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:50,102 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-18 17:04:50,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 17:04:50,103 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-18 17:04:50,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 17:04:50,104 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:50,104 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 17:04:50,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:04:50,104 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:50,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:50,105 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-18 17:04:50,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:50,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305442807] [2020-08-18 17:04:50,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:50,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,440 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 17:04:50,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305442807] [2020-08-18 17:04:50,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:50,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 17:04:50,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646685330] [2020-08-18 17:04:50,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 17:04:50,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:50,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 17:04:50,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-18 17:04:50,443 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-18 17:04:50,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:50,589 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-18 17:04:50,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 17:04:50,590 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-18 17:04:50,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:50,591 INFO L225 Difference]: With dead ends: 49 [2020-08-18 17:04:50,591 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 17:04:50,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-18 17:04:50,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 17:04:50,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-18 17:04:50,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 17:04:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-18 17:04:50,599 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-18 17:04:50,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:50,599 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-18 17:04:50,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 17:04:50,599 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-18 17:04:50,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 17:04:50,600 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:50,601 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 17:04:50,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:04:50,601 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:50,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:50,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-18 17:04:50,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:50,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005896790] [2020-08-18 17:04:50,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:50,956 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 17:04:50,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005896790] [2020-08-18 17:04:50,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:50,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 17:04:50,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834845752] [2020-08-18 17:04:50,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 17:04:50,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:50,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 17:04:50,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-18 17:04:50,959 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-18 17:04:51,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:51,140 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-18 17:04:51,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 17:04:51,145 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-18 17:04:51,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:51,147 INFO L225 Difference]: With dead ends: 52 [2020-08-18 17:04:51,147 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 17:04:51,148 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 17:04:51,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 17:04:51,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-18 17:04:51,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 17:04:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-18 17:04:51,155 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-18 17:04:51,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:51,156 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-18 17:04:51,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 17:04:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-18 17:04:51,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 17:04:51,157 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:51,158 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 17:04:51,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 17:04:51,158 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:51,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:51,159 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-08-18 17:04:51,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:51,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49433158] [2020-08-18 17:04:51,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:51,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:51,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:51,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:51,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:51,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:51,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:51,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:51,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:51,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:51,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:51,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:51,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:51,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:51,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:51,550 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 17:04:51,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49433158] [2020-08-18 17:04:51,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:51,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 17:04:51,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227452622] [2020-08-18 17:04:51,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 17:04:51,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:51,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 17:04:51,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-18 17:04:51,553 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-18 17:04:51,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:51,734 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-18 17:04:51,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 17:04:51,735 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-18 17:04:51,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:51,736 INFO L225 Difference]: With dead ends: 55 [2020-08-18 17:04:51,736 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 17:04:51,738 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 17:04:51,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 17:04:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-18 17:04:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-18 17:04:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-18 17:04:51,744 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-18 17:04:51,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:51,744 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-18 17:04:51,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 17:04:51,745 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-18 17:04:51,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 17:04:51,746 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:51,746 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 17:04:51,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 17:04:51,746 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:51,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:51,747 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-08-18 17:04:51,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:51,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493584936] [2020-08-18 17:04:51,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:51,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:51,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:51,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:51,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:51,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:51,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:52,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:52,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:52,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:52,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:52,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:52,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:52,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:52,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:52,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:52,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:52,328 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 17:04:52,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493584936] [2020-08-18 17:04:52,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:52,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 17:04:52,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695599569] [2020-08-18 17:04:52,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 17:04:52,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:52,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 17:04:52,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-18 17:04:52,332 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-18 17:04:52,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:52,540 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-18 17:04:52,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 17:04:52,540 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-18 17:04:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:52,542 INFO L225 Difference]: With dead ends: 58 [2020-08-18 17:04:52,543 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 17:04:52,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-18 17:04:52,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 17:04:52,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-18 17:04:52,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 17:04:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-18 17:04:52,561 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-18 17:04:52,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:52,561 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-18 17:04:52,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 17:04:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-18 17:04:52,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 17:04:52,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:52,563 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 17:04:52,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 17:04:52,564 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:52,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:52,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-08-18 17:04:52,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:52,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135148297] [2020-08-18 17:04:52,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:52,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:52,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:52,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:52,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:52,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:52,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:52,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:52,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:52,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:52,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,172 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 17:04:53,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135148297] [2020-08-18 17:04:53,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:53,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 17:04:53,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132556498] [2020-08-18 17:04:53,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 17:04:53,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:53,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 17:04:53,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-18 17:04:53,175 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-18 17:04:53,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:53,372 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-18 17:04:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 17:04:53,372 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-18 17:04:53,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:53,374 INFO L225 Difference]: With dead ends: 61 [2020-08-18 17:04:53,374 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 17:04:53,375 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 17:04:53,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 17:04:53,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-18 17:04:53,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 17:04:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-18 17:04:53,386 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-18 17:04:53,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:53,387 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-18 17:04:53,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 17:04:53,387 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-18 17:04:53,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 17:04:53,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:53,388 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 17:04:53,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 17:04:53,389 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:53,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:53,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-08-18 17:04:53,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:53,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007953018] [2020-08-18 17:04:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:04:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:53,962 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 17:04:53,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007953018] [2020-08-18 17:04:53,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:53,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 17:04:53,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27660836] [2020-08-18 17:04:53,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 17:04:53,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:53,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 17:04:53,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-18 17:04:53,964 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-18 17:04:54,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:54,193 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-18 17:04:54,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 17:04:54,194 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-18 17:04:54,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:54,195 INFO L225 Difference]: With dead ends: 64 [2020-08-18 17:04:54,196 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 17:04:54,197 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 17:04:54,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 17:04:54,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-18 17:04:54,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-18 17:04:54,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-18 17:04:54,203 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-18 17:04:54,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:54,203 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-18 17:04:54,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 17:04:54,204 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-18 17:04:54,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-18 17:04:54,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:54,206 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 17:04:54,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 17:04:54,206 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:54,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:54,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-08-18 17:04:54,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:54,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294824905] [2020-08-18 17:04:54,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:04:54,246 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:04:54,247 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:04:54,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 17:04:54,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:04:54 BoogieIcfgContainer [2020-08-18 17:04:54,281 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:04:54,284 INFO L168 Benchmark]: Toolchain (without parser) took 8136.19 ms. Allocated memory was 140.0 MB in the beginning and 357.6 MB in the end (delta: 217.6 MB). Free memory was 103.2 MB in the beginning and 121.4 MB in the end (delta: -18.2 MB). Peak memory consumption was 199.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:04:54,285 INFO L168 Benchmark]: CDTParser took 0.20 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: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 17:04:54,286 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.64 ms. Allocated memory is still 140.0 MB. Free memory was 103.0 MB in the beginning and 93.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-18 17:04:54,286 INFO L168 Benchmark]: Boogie Preprocessor took 112.43 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.7 MB in the beginning and 181.5 MB in the end (delta: -87.8 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 17:04:54,287 INFO L168 Benchmark]: RCFGBuilder took 240.81 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 169.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-08-18 17:04:54,288 INFO L168 Benchmark]: TraceAbstraction took 7547.62 ms. Allocated memory was 202.4 MB in the beginning and 357.6 MB in the end (delta: 155.2 MB). Free memory was 169.2 MB in the beginning and 121.4 MB in the end (delta: 47.8 MB). Peak memory consumption was 203.0 MB. Max. memory is 7.1 GB. [2020-08-18 17:04:54,292 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 226.64 ms. Allocated memory is still 140.0 MB. Free memory was 103.0 MB in the beginning and 93.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.43 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.7 MB in the beginning and 181.5 MB in the end (delta: -87.8 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 240.81 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 169.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7547.62 ms. Allocated memory was 202.4 MB in the beginning and 357.6 MB in the end (delta: 155.2 MB). Free memory was 169.2 MB in the beginning and 121.4 MB in the end (delta: 47.8 MB). Peak memory consumption was 203.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 15; [L13] int b = 0; [L14] CALL, EXPR sum(a, b) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND TRUE n <= 0 [L5] return m + n; [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) [L14] int result = sum(a, b); [L15] COND TRUE result == a + b [L16] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.4s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 183 SDtfs, 318 SDslu, 711 SDs, 0 SdLazy, 522 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 928 NumberOfCodeBlocks, 928 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 810 ConstructedInterpolants, 0 QuantifiedInterpolants, 133800 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 1575/3150 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...