/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=DEEPEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:05:39,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:05:39,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:05:39,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:05:39,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:05:39,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:05:39,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:05:39,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:05:39,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:05:39,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:05:39,265 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:05:39,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:05:39,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:05:39,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:05:39,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:05:39,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:05:39,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:05:39,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:05:39,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:05:39,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:05:39,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:05:39,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:05:39,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:05:39,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:05:39,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 21:05:39,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:05:39,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:05:39,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:05:39,322 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 21:05:39,344 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:05:39,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:05:39,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:05:39,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:05:39,346 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:05:39,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:05:39,346 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:05:39,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:05:39,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:05:39,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:05:39,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:05:39,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:05:39,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:05:39,347 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:05:39,348 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:05:39,348 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:05:39,348 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:05:39,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:05:39,348 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:05:39,349 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:05:39,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:05:39,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:05:39,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:05:39,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:05:39,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:05:39,350 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:05:39,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:05:39,350 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:05:39,350 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:05:39,350 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=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:05:39,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:05:39,704 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:05:39,709 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:05:39,711 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:05:39,712 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:05:39,712 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-08-18 21:05:39,774 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/721400e18/d8493c602da147bea8814b6fee560c96/FLAG2cc9ef3d5 [2020-08-18 21:05:40,197 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:05:40,198 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-08-18 21:05:40,206 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/721400e18/d8493c602da147bea8814b6fee560c96/FLAG2cc9ef3d5 [2020-08-18 21:05:40,608 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/721400e18/d8493c602da147bea8814b6fee560c96 [2020-08-18 21:05:40,618 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:05:40,620 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:05:40,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:05:40,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:05:40,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:05:40,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:05:40" (1/1) ... [2020-08-18 21:05:40,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bb34a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40, skipping insertion in model container [2020-08-18 21:05:40,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:05:40" (1/1) ... [2020-08-18 21:05:40,638 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:05:40,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:05:40,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:05:40,923 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:05:40,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:05:40,966 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:05:40,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40 WrapperNode [2020-08-18 21:05:40,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:05:40,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:05:40,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:05:40,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:05:40,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40" (1/1) ... [2020-08-18 21:05:40,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40" (1/1) ... [2020-08-18 21:05:41,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40" (1/1) ... [2020-08-18 21:05:41,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40" (1/1) ... [2020-08-18 21:05:41,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40" (1/1) ... [2020-08-18 21:05:41,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40" (1/1) ... [2020-08-18 21:05:41,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40" (1/1) ... [2020-08-18 21:05:41,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:05:41,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:05:41,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:05:41,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:05:41,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40" (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 21:05:41,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:05:41,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:05:41,163 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-18 21:05:41,163 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-18 21:05:41,163 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:05:41,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:05:41,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:05:41,164 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-18 21:05:41,164 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-18 21:05:41,164 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:05:41,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:05:41,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:05:41,381 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:05:41,381 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 21:05:41,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:05:41 BoogieIcfgContainer [2020-08-18 21:05:41,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:05:41,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:05:41,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:05:41,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:05:41,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:05:40" (1/3) ... [2020-08-18 21:05:41,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e5e2b82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:05:41, skipping insertion in model container [2020-08-18 21:05:41,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40" (2/3) ... [2020-08-18 21:05:41,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e5e2b82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:05:41, skipping insertion in model container [2020-08-18 21:05:41,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:05:41" (3/3) ... [2020-08-18 21:05:41,394 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2020-08-18 21:05:41,406 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:05:41,417 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:05:41,433 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:05:41,472 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:05:41,472 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:05:41,472 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:05:41,472 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:05:41,472 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:05:41,473 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:05:41,473 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:05:41,473 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:05:41,499 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-18 21:05:41,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 21:05:41,508 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:41,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:41,510 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:41,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:41,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-18 21:05:41,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:41,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604967655] [2020-08-18 21:05:41,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:41,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:41,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:41,843 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 21:05:41,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604967655] [2020-08-18 21:05:41,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:05:41,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:05:41,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785645641] [2020-08-18 21:05:41,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:05:41,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:41,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:05:41,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:05:41,880 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-18 21:05:42,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:42,047 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-18 21:05:42,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:05:42,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 21:05:42,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:42,069 INFO L225 Difference]: With dead ends: 44 [2020-08-18 21:05:42,069 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 21:05:42,073 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 21:05:42,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 21:05:42,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 21:05:42,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 21:05:42,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-18 21:05:42,122 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-18 21:05:42,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:42,123 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-18 21:05:42,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:05:42,123 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-18 21:05:42,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 21:05:42,125 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:42,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:42,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:05:42,126 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:42,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:42,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-18 21:05:42,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:42,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931919877] [2020-08-18 21:05:42,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,197 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 21:05:42,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931919877] [2020-08-18 21:05:42,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:05:42,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:05:42,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787221123] [2020-08-18 21:05:42,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:05:42,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:42,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:05:42,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:05:42,202 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-18 21:05:42,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:42,278 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-18 21:05:42,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:05:42,279 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 21:05:42,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:42,281 INFO L225 Difference]: With dead ends: 36 [2020-08-18 21:05:42,281 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 21:05:42,283 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 21:05:42,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 21:05:42,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 21:05:42,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 21:05:42,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-18 21:05:42,294 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-18 21:05:42,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:42,294 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-18 21:05:42,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:05:42,295 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-18 21:05:42,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 21:05:42,297 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:42,297 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:42,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:05:42,298 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:42,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:42,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-18 21:05:42,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:42,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704939183] [2020-08-18 21:05:42,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:05:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 21:05:42,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704939183] [2020-08-18 21:05:42,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:42,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 21:05:42,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641246076] [2020-08-18 21:05:42,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:05:42,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:42,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:05:42,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:05:42,504 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-18 21:05:42,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:42,628 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-18 21:05:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 21:05:42,629 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-18 21:05:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:42,632 INFO L225 Difference]: With dead ends: 58 [2020-08-18 21:05:42,632 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 21:05:42,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:05:42,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 21:05:42,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-18 21:05:42,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 21:05:42,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-18 21:05:42,645 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-18 21:05:42,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:42,645 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-18 21:05:42,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:05:42,646 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-18 21:05:42,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 21:05:42,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:42,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:42,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:05:42,649 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:42,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:42,649 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-18 21:05:42,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:42,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926447127] [2020-08-18 21:05:42,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 21:05:42,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926447127] [2020-08-18 21:05:42,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:42,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 21:05:42,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735253042] [2020-08-18 21:05:42,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:05:42,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:42,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:05:42,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:05:42,784 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-18 21:05:42,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:42,974 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-18 21:05:42,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:05:42,975 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-18 21:05:42,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:42,979 INFO L225 Difference]: With dead ends: 54 [2020-08-18 21:05:42,979 INFO L226 Difference]: Without dead ends: 50 [2020-08-18 21:05:42,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:05:42,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-18 21:05:42,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-18 21:05:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 21:05:42,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-18 21:05:42,995 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-18 21:05:42,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:42,995 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-18 21:05:42,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:05:42,995 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-18 21:05:42,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-18 21:05:42,998 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:42,998 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:42,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:05:42,999 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:42,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:42,999 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-18 21:05:42,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:43,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111044771] [2020-08-18 21:05:43,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:05:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 21:05:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 21:05:43,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111044771] [2020-08-18 21:05:43,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:43,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 21:05:43,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222626474] [2020-08-18 21:05:43,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:05:43,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:43,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:05:43,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:05:43,142 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-18 21:05:43,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:43,236 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-18 21:05:43,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:05:43,237 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-18 21:05:43,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:43,239 INFO L225 Difference]: With dead ends: 94 [2020-08-18 21:05:43,240 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 21:05:43,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:05:43,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 21:05:43,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-18 21:05:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-18 21:05:43,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-18 21:05:43,254 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-18 21:05:43,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:43,255 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-18 21:05:43,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:05:43,255 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-18 21:05:43,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 21:05:43,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:43,258 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:43,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:05:43,258 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:43,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:43,259 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-18 21:05:43,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:43,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192518585] [2020-08-18 21:05:43,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-18 21:05:43,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192518585] [2020-08-18 21:05:43,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:43,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 21:05:43,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647084831] [2020-08-18 21:05:43,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:05:43,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:43,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:05:43,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:05:43,460 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-18 21:05:43,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:43,611 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-18 21:05:43,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 21:05:43,613 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-18 21:05:43,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:43,619 INFO L225 Difference]: With dead ends: 103 [2020-08-18 21:05:43,620 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 21:05:43,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:05:43,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 21:05:43,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-18 21:05:43,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 21:05:43,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-18 21:05:43,657 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-18 21:05:43,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:43,657 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-18 21:05:43,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:05:43,658 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-18 21:05:43,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 21:05:43,663 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:43,663 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:43,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:05:43,668 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:43,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:43,668 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-18 21:05:43,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:43,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609368131] [2020-08-18 21:05:43,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 21:05:43,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609368131] [2020-08-18 21:05:43,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:43,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 21:05:43,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685678798] [2020-08-18 21:05:43,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:05:43,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:43,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:05:43,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:05:43,878 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-18 21:05:44,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:44,121 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-18 21:05:44,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:05:44,122 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-18 21:05:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:44,125 INFO L225 Difference]: With dead ends: 86 [2020-08-18 21:05:44,125 INFO L226 Difference]: Without dead ends: 82 [2020-08-18 21:05:44,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-18 21:05:44,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-18 21:05:44,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-18 21:05:44,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 21:05:44,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-18 21:05:44,156 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-18 21:05:44,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:44,156 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-18 21:05:44,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:05:44,157 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-18 21:05:44,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 21:05:44,159 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:44,160 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:44,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:05:44,160 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:44,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:44,161 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-18 21:05:44,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:44,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087529631] [2020-08-18 21:05:44,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 21:05:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-18 21:05:44,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087529631] [2020-08-18 21:05:44,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:44,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 21:05:44,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813151224] [2020-08-18 21:05:44,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:05:44,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:44,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:05:44,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:05:44,296 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-18 21:05:44,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:44,434 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-18 21:05:44,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:05:44,435 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-18 21:05:44,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:44,437 INFO L225 Difference]: With dead ends: 167 [2020-08-18 21:05:44,437 INFO L226 Difference]: Without dead ends: 94 [2020-08-18 21:05:44,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:05:44,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-18 21:05:44,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-18 21:05:44,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-18 21:05:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-18 21:05:44,455 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-18 21:05:44,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:44,456 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-18 21:05:44,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:05:44,457 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-18 21:05:44,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 21:05:44,459 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:44,459 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:44,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:05:44,460 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:44,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:44,460 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-18 21:05:44,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:44,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621306440] [2020-08-18 21:05:44,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 21:05:44,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621306440] [2020-08-18 21:05:44,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:44,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:05:44,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853985362] [2020-08-18 21:05:44,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:05:44,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:44,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:05:44,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:05:44,609 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-18 21:05:44,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:44,867 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-18 21:05:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 21:05:44,868 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-18 21:05:44,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:44,870 INFO L225 Difference]: With dead ends: 188 [2020-08-18 21:05:44,871 INFO L226 Difference]: Without dead ends: 109 [2020-08-18 21:05:44,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:05:44,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-18 21:05:44,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-18 21:05:44,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-18 21:05:44,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-18 21:05:44,913 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-18 21:05:44,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:44,913 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-18 21:05:44,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:05:44,914 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-18 21:05:44,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-18 21:05:44,917 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:44,917 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:44,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:05:44,918 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:44,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:44,919 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-18 21:05:44,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:44,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680180032] [2020-08-18 21:05:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-18 21:05:45,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680180032] [2020-08-18 21:05:45,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:45,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 21:05:45,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729542777] [2020-08-18 21:05:45,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 21:05:45,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:45,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 21:05:45,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-18 21:05:45,160 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-18 21:05:45,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:45,565 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-18 21:05:45,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 21:05:45,566 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-18 21:05:45,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:45,568 INFO L225 Difference]: With dead ends: 199 [2020-08-18 21:05:45,568 INFO L226 Difference]: Without dead ends: 86 [2020-08-18 21:05:45,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-08-18 21:05:45,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-18 21:05:45,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2020-08-18 21:05:45,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-18 21:05:45,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2020-08-18 21:05:45,580 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 82 [2020-08-18 21:05:45,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:45,581 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2020-08-18 21:05:45,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 21:05:45,581 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2020-08-18 21:05:45,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-18 21:05:45,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:45,583 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:45,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:05:45,583 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:45,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:45,584 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 2 times [2020-08-18 21:05:45,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:45,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865900325] [2020-08-18 21:05:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 21:05:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-08-18 21:05:45,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865900325] [2020-08-18 21:05:45,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:45,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:05:45,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88060692] [2020-08-18 21:05:45,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:05:45,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:45,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:05:45,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:05:45,858 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand 10 states. [2020-08-18 21:05:46,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:46,050 INFO L93 Difference]: Finished difference Result 142 states and 204 transitions. [2020-08-18 21:05:46,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 21:05:46,051 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2020-08-18 21:05:46,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:46,052 INFO L225 Difference]: With dead ends: 142 [2020-08-18 21:05:46,052 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 21:05:46,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:05:46,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 21:05:46,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-18 21:05:46,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-18 21:05:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2020-08-18 21:05:46,070 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 110 [2020-08-18 21:05:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:46,071 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2020-08-18 21:05:46,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:05:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2020-08-18 21:05:46,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-18 21:05:46,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:46,073 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:46,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:05:46,073 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:46,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:46,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1263382818, now seen corresponding path program 3 times [2020-08-18 21:05:46,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:46,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705835350] [2020-08-18 21:05:46,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 21:05:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 21:05:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:46,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 21:05:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,569 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 133 proven. 373 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2020-08-18 21:05:46,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705835350] [2020-08-18 21:05:46,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:46,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 21:05:46,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395397765] [2020-08-18 21:05:46,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 21:05:46,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:46,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 21:05:46,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-08-18 21:05:46,572 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 15 states. [2020-08-18 21:05:47,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:47,223 INFO L93 Difference]: Finished difference Result 184 states and 282 transitions. [2020-08-18 21:05:47,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 21:05:47,224 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 192 [2020-08-18 21:05:47,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:47,226 INFO L225 Difference]: With dead ends: 184 [2020-08-18 21:05:47,226 INFO L226 Difference]: Without dead ends: 111 [2020-08-18 21:05:47,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2020-08-18 21:05:47,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-18 21:05:47,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2020-08-18 21:05:47,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-18 21:05:47,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2020-08-18 21:05:47,242 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 192 [2020-08-18 21:05:47,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:47,243 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2020-08-18 21:05:47,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 21:05:47,243 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2020-08-18 21:05:47,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-18 21:05:47,250 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:47,251 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:47,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 21:05:47,251 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:47,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:47,252 INFO L82 PathProgramCache]: Analyzing trace with hash -2102107778, now seen corresponding path program 1 times [2020-08-18 21:05:47,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:47,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852854054] [2020-08-18 21:05:47,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 21:05:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 21:05:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 109 proven. 85 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-08-18 21:05:47,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852854054] [2020-08-18 21:05:47,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:47,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 21:05:47,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221037031] [2020-08-18 21:05:47,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 21:05:47,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:47,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 21:05:47,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-18 21:05:47,610 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand 11 states. [2020-08-18 21:05:47,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:47,909 INFO L93 Difference]: Finished difference Result 188 states and 266 transitions. [2020-08-18 21:05:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 21:05:47,910 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136 [2020-08-18 21:05:47,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:47,912 INFO L225 Difference]: With dead ends: 188 [2020-08-18 21:05:47,912 INFO L226 Difference]: Without dead ends: 101 [2020-08-18 21:05:47,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-18 21:05:47,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-18 21:05:47,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2020-08-18 21:05:47,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-18 21:05:47,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 130 transitions. [2020-08-18 21:05:47,923 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 130 transitions. Word has length 136 [2020-08-18 21:05:47,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:47,923 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 130 transitions. [2020-08-18 21:05:47,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 21:05:47,924 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 130 transitions. [2020-08-18 21:05:47,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-18 21:05:47,926 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:47,927 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:47,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 21:05:47,927 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:47,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:47,928 INFO L82 PathProgramCache]: Analyzing trace with hash 677703633, now seen corresponding path program 2 times [2020-08-18 21:05:47,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:47,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527327088] [2020-08-18 21:05:47,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 21:05:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 21:05:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 138 proven. 250 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2020-08-18 21:05:48,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527327088] [2020-08-18 21:05:48,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:48,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 21:05:48,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101384149] [2020-08-18 21:05:48,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 21:05:48,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:48,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 21:05:48,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:05:48,379 INFO L87 Difference]: Start difference. First operand 98 states and 130 transitions. Second operand 14 states. [2020-08-18 21:05:48,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:48,958 INFO L93 Difference]: Finished difference Result 217 states and 326 transitions. [2020-08-18 21:05:48,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 21:05:48,959 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 177 [2020-08-18 21:05:48,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:48,962 INFO L225 Difference]: With dead ends: 217 [2020-08-18 21:05:48,962 INFO L226 Difference]: Without dead ends: 124 [2020-08-18 21:05:48,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2020-08-18 21:05:48,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-18 21:05:48,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2020-08-18 21:05:48,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-18 21:05:48,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 144 transitions. [2020-08-18 21:05:48,979 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 144 transitions. Word has length 177 [2020-08-18 21:05:48,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:48,980 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 144 transitions. [2020-08-18 21:05:48,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 21:05:48,980 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 144 transitions. [2020-08-18 21:05:48,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-18 21:05:48,982 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:48,982 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:48,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 21:05:48,983 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:48,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:48,983 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 3 times [2020-08-18 21:05:48,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:48,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600100683] [2020-08-18 21:05:48,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:49,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 21:05:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 21:05:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 144 proven. 139 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-08-18 21:05:49,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600100683] [2020-08-18 21:05:49,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:49,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 21:05:49,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753511606] [2020-08-18 21:05:49,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 21:05:49,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:49,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 21:05:49,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:05:49,387 INFO L87 Difference]: Start difference. First operand 107 states and 144 transitions. Second operand 14 states. [2020-08-18 21:05:49,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:49,872 INFO L93 Difference]: Finished difference Result 211 states and 302 transitions. [2020-08-18 21:05:49,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 21:05:49,873 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 150 [2020-08-18 21:05:49,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:49,874 INFO L225 Difference]: With dead ends: 211 [2020-08-18 21:05:49,874 INFO L226 Difference]: Without dead ends: 114 [2020-08-18 21:05:49,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-08-18 21:05:49,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-18 21:05:49,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-08-18 21:05:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-18 21:05:49,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 147 transitions. [2020-08-18 21:05:49,887 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 147 transitions. Word has length 150 [2020-08-18 21:05:49,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:49,888 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 147 transitions. [2020-08-18 21:05:49,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 21:05:49,888 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 147 transitions. [2020-08-18 21:05:49,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-18 21:05:49,890 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:49,891 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:49,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 21:05:49,891 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:49,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:49,891 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 4 times [2020-08-18 21:05:49,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:49,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060128369] [2020-08-18 21:05:49,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 21:05:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 21:05:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-08-18 21:05:50,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060128369] [2020-08-18 21:05:50,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:50,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 21:05:50,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139583382] [2020-08-18 21:05:50,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 21:05:50,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:50,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 21:05:50,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-08-18 21:05:50,999 INFO L87 Difference]: Start difference. First operand 111 states and 147 transitions. Second operand 28 states. [2020-08-18 21:05:51,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:51,645 INFO L93 Difference]: Finished difference Result 124 states and 167 transitions. [2020-08-18 21:05:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 21:05:51,646 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 177 [2020-08-18 21:05:51,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:51,648 INFO L225 Difference]: With dead ends: 124 [2020-08-18 21:05:51,649 INFO L226 Difference]: Without dead ends: 120 [2020-08-18 21:05:51,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 21:05:51,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-08-18 21:05:51,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2020-08-18 21:05:51,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-08-18 21:05:51,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 157 transitions. [2020-08-18 21:05:51,669 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 157 transitions. Word has length 177 [2020-08-18 21:05:51,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:51,671 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 157 transitions. [2020-08-18 21:05:51,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 21:05:51,672 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 157 transitions. [2020-08-18 21:05:51,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-08-18 21:05:51,675 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:51,675 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:51,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 21:05:51,675 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:51,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:51,676 INFO L82 PathProgramCache]: Analyzing trace with hash -678687486, now seen corresponding path program 5 times [2020-08-18 21:05:51,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:51,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739524144] [2020-08-18 21:05:51,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:51,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:51,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:51,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:51,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:51,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:51,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:51,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:51,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:51,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:51,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:51,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:51,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:51,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 21:05:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:51,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:51,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:51,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:51,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:51,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 21:05:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:51,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:52,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:52,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:52,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:52,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:52,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:52,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:52,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:52,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:52,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 21:05:52,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:52,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:52,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:52,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:52,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 207 proven. 371 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2020-08-18 21:05:52,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739524144] [2020-08-18 21:05:52,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:52,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 21:05:52,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924354622] [2020-08-18 21:05:52,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 21:05:52,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:52,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 21:05:52,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-08-18 21:05:52,204 INFO L87 Difference]: Start difference. First operand 116 states and 157 transitions. Second operand 16 states. [2020-08-18 21:05:52,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:52,916 INFO L93 Difference]: Finished difference Result 245 states and 365 transitions. [2020-08-18 21:05:52,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-18 21:05:52,917 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 218 [2020-08-18 21:05:52,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:52,920 INFO L225 Difference]: With dead ends: 245 [2020-08-18 21:05:52,920 INFO L226 Difference]: Without dead ends: 134 [2020-08-18 21:05:52,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 21:05:52,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-18 21:05:52,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 120. [2020-08-18 21:05:52,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-18 21:05:52,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 159 transitions. [2020-08-18 21:05:52,937 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 159 transitions. Word has length 218 [2020-08-18 21:05:52,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:52,939 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 159 transitions. [2020-08-18 21:05:52,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 21:05:52,939 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 159 transitions. [2020-08-18 21:05:52,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-08-18 21:05:52,944 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:52,944 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 16, 15, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:52,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 21:05:52,945 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:52,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:52,945 INFO L82 PathProgramCache]: Analyzing trace with hash -806788011, now seen corresponding path program 6 times [2020-08-18 21:05:52,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:52,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313603359] [2020-08-18 21:05:52,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 21:05:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 21:05:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 21:05:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 21:05:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 177 proven. 317 refuted. 0 times theorem prover too weak. 1315 trivial. 0 not checked. [2020-08-18 21:05:53,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313603359] [2020-08-18 21:05:53,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:53,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 21:05:53,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231214837] [2020-08-18 21:05:53,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 21:05:53,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:53,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 21:05:53,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-18 21:05:53,603 INFO L87 Difference]: Start difference. First operand 120 states and 159 transitions. Second operand 11 states. [2020-08-18 21:05:53,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:53,929 INFO L93 Difference]: Finished difference Result 233 states and 321 transitions. [2020-08-18 21:05:53,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 21:05:53,930 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 260 [2020-08-18 21:05:53,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:53,932 INFO L225 Difference]: With dead ends: 233 [2020-08-18 21:05:53,933 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 21:05:53,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-18 21:05:53,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 21:05:53,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2020-08-18 21:05:53,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-18 21:05:53,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 155 transitions. [2020-08-18 21:05:53,946 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 155 transitions. Word has length 260 [2020-08-18 21:05:53,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:53,947 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 155 transitions. [2020-08-18 21:05:53,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 21:05:53,948 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 155 transitions. [2020-08-18 21:05:53,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-08-18 21:05:53,956 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:53,957 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 17, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:53,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 21:05:53,957 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:53,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:53,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1614185823, now seen corresponding path program 7 times [2020-08-18 21:05:53,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:53,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573029952] [2020-08-18 21:05:53,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:54,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:54,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 21:05:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 21:05:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-18 21:05:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 21:05:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 132 proven. 466 refuted. 0 times theorem prover too weak. 1618 trivial. 0 not checked. [2020-08-18 21:05:54,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573029952] [2020-08-18 21:05:54,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:54,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 21:05:54,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696792340] [2020-08-18 21:05:54,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 21:05:54,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:54,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 21:05:54,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-08-18 21:05:54,687 INFO L87 Difference]: Start difference. First operand 119 states and 155 transitions. Second operand 12 states. [2020-08-18 21:05:55,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:55,027 INFO L93 Difference]: Finished difference Result 141 states and 187 transitions. [2020-08-18 21:05:55,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 21:05:55,027 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 286 [2020-08-18 21:05:55,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:55,028 INFO L225 Difference]: With dead ends: 141 [2020-08-18 21:05:55,028 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 21:05:55,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-08-18 21:05:55,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 21:05:55,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 21:05:55,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 21:05:55,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 21:05:55,030 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 286 [2020-08-18 21:05:55,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:55,031 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 21:05:55,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 21:05:55,031 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 21:05:55,031 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 21:05:55,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 21:05:55,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 21:05:56,053 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 29 [2020-08-18 21:05:56,702 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 32 [2020-08-18 21:05:56,707 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 21:05:56,708 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:05:56,708 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:05:56,708 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 21:05:56,708 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 21:05:56,708 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 21:05:56,708 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-08-18 21:05:56,709 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-08-18 21:05:56,709 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-08-18 21:05:56,709 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-08-18 21:05:56,709 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-18 21:05:56,709 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-18 21:05:56,709 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 6 main_~x~0) (<= main_~x~0 6)) [2020-08-18 21:05:56,709 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-08-18 21:05:56,710 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-08-18 21:05:56,710 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-08-18 21:05:56,710 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-08-18 21:05:56,710 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-18 21:05:56,710 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= 4 fibo2_~n) (<= 2 |fibo2_#t~ret2|) (<= |fibo2_#in~n| 4) (<= |fibo2_#t~ret2| 2) .cse0) (and (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3) .cse0 (<= 5 |fibo2_#in~n|)) (and .cse0 (<= 6 |fibo2_#in~n|)) (and (<= |fibo2_#t~ret2| 1) .cse0 (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#in~n| 2)))) (not (<= |fibo2_#in~n| 1))) [2020-08-18 21:05:56,710 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-08-18 21:05:56,711 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-08-18 21:05:56,711 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-08-18 21:05:56,711 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-08-18 21:05:56,711 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-08-18 21:05:56,711 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-08-18 21:05:56,711 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (= fibo1_~n |fibo1_#in~n|)) [2020-08-18 21:05:56,711 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-08-18 21:05:56,712 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (or (and (<= |fibo1_#t~ret0| 1) (<= 1 |fibo1_#t~ret0|) (<= fibo1_~n 3)) (not (<= |fibo1_#in~n| 4)) (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2) (<= 4 |fibo1_#in~n|))) (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 5 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 5) .cse0) (and (<= fibo1_~n 5) .cse0) (and (<= 7 |fibo1_#in~n|) .cse0)))) [2020-08-18 21:05:56,712 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-08-18 21:05:56,712 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-08-18 21:05:56,712 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-08-18 21:05:56,712 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-08-18 21:05:56,712 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-08-18 21:05:56,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:05:56 BoogieIcfgContainer [2020-08-18 21:05:56,720 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:05:56,722 INFO L168 Benchmark]: Toolchain (without parser) took 16102.22 ms. Allocated memory was 147.3 MB in the beginning and 482.9 MB in the end (delta: 335.5 MB). Free memory was 103.5 MB in the beginning and 294.0 MB in the end (delta: -190.5 MB). Peak memory consumption was 314.9 MB. Max. memory is 7.1 GB. [2020-08-18 21:05:56,722 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 21:05:56,723 INFO L168 Benchmark]: CACSL2BoogieTranslator took 347.09 ms. Allocated memory is still 147.3 MB. Free memory was 103.3 MB in the beginning and 93.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-18 21:05:56,724 INFO L168 Benchmark]: Boogie Preprocessor took 127.24 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 93.6 MB in the beginning and 182.8 MB in the end (delta: -89.2 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-18 21:05:56,725 INFO L168 Benchmark]: RCFGBuilder took 290.09 ms. Allocated memory is still 203.9 MB. Free memory was 182.8 MB in the beginning and 168.7 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-08-18 21:05:56,725 INFO L168 Benchmark]: TraceAbstraction took 15332.56 ms. Allocated memory was 203.9 MB in the beginning and 482.9 MB in the end (delta: 278.9 MB). Free memory was 168.1 MB in the beginning and 294.0 MB in the end (delta: -125.9 MB). Peak memory consumption was 322.8 MB. Max. memory is 7.1 GB. [2020-08-18 21:05:56,728 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 347.09 ms. Allocated memory is still 147.3 MB. Free memory was 103.3 MB in the beginning and 93.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.24 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 93.6 MB in the beginning and 182.8 MB in the end (delta: -89.2 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 290.09 ms. Allocated memory is still 203.9 MB. Free memory was 182.8 MB in the beginning and 168.7 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15332.56 ms. Allocated memory was 203.9 MB in the beginning and 482.9 MB in the end (delta: 278.9 MB). Free memory was 168.1 MB in the beginning and 294.0 MB in the end (delta: -125.9 MB). Peak memory consumption was 322.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.5s, OverallIterations: 19, TraceHistogramMax: 21, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 634 SDtfs, 595 SDslu, 4365 SDs, 0 SdLazy, 4266 SolverSat, 458 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 973 GetRequests, 691 SyntacticMatches, 0 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 19 MinimizatonAttempts, 98 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 647 PreInvPairs, 912 NumberOfFragments, 138 HoareAnnotationTreeSize, 647 FomulaSimplifications, 2845 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 11 FomulaSimplificationsInter, 4707 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 2097 NumberOfCodeBlocks, 2097 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 2078 ConstructedInterpolants, 0 QuantifiedInterpolants, 641722 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 2 PerfectInterpolantSequences, 6946/9383 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...