/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=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/count_by_1_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 13:04:57,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 13:04:57,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 13:04:57,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-18 13:04:57,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 13:04:57,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 13:04:57,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 13:04:57,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 13:04:57,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 13:04:57,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 13:04:57,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 13:04:57,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 13:04:57,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 13:04:57,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 13:04:57,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 13:04:57,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 13:04:57,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 13:04:57,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 13:04:57,912 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 13:04:57,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 13:04:57,914 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 13:04:57,955 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 13:04:57,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 13:04:57,957 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 13:04:57,958 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 13:04:57,958 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 13:04:57,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 13:04:57,958 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 13:04:57,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 13:04:57,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 13:04:57,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 13:04:57,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 13:04:57,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 13:04:57,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 13:04:57,961 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 13:04:57,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 13:04:57,961 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 13:04:57,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 13:04:57,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 13:04:57,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 13:04:57,962 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 13:04:57,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 13:04:57,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 13:04:57,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 13:04:57,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 13:04:57,963 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 13:04:57,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 13:04:57,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 13:04:57,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 13:04:57,964 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 13:04:57,964 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=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 13:04:58,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 13:04:58,310 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 13:04:58,315 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 13:04:58,316 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 13:04:58,317 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 13:04:58,318 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1_variant.i [2020-08-18 13:04:58,396 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aaf4f9bbf/906db575431247abbc2e9e6ca286f52b/FLAGa54d2e896 [2020-08-18 13:04:58,847 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 13:04:58,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/count_by_1_variant.i [2020-08-18 13:04:58,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aaf4f9bbf/906db575431247abbc2e9e6ca286f52b/FLAGa54d2e896 [2020-08-18 13:04:59,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aaf4f9bbf/906db575431247abbc2e9e6ca286f52b [2020-08-18 13:04:59,246 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 13:04:59,248 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 13:04:59,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 13:04:59,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 13:04:59,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 13:04:59,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 01:04:59" (1/1) ... [2020-08-18 13:04:59,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@723bd7c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:04:59, skipping insertion in model container [2020-08-18 13:04:59,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 01:04:59" (1/1) ... [2020-08-18 13:04:59,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 13:04:59,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 13:04:59,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 13:04:59,528 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 13:04:59,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 13:04:59,567 INFO L208 MainTranslator]: Completed translation [2020-08-18 13:04:59,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:04:59 WrapperNode [2020-08-18 13:04:59,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 13:04:59,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 13:04:59,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 13:04:59,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 13:04:59,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:04:59" (1/1) ... [2020-08-18 13:04:59,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:04:59" (1/1) ... [2020-08-18 13:04:59,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:04:59" (1/1) ... [2020-08-18 13:04:59,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:04:59" (1/1) ... [2020-08-18 13:04:59,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:04:59" (1/1) ... [2020-08-18 13:04:59,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:04:59" (1/1) ... [2020-08-18 13:04:59,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:04:59" (1/1) ... [2020-08-18 13:04:59,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 13:04:59,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 13:04:59,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 13:04:59,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 13:04:59,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:04:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 13:04:59,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 13:04:59,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 13:04:59,771 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 13:04:59,772 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 13:04:59,773 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 13:04:59,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 13:04:59,773 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 13:04:59,773 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 13:04:59,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 13:04:59,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 13:04:59,774 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 13:04:59,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 13:04:59,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 13:04:59,948 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 13:04:59,949 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 13:04:59,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 01:04:59 BoogieIcfgContainer [2020-08-18 13:04:59,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 13:04:59,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 13:04:59,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 13:04:59,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 13:04:59,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 01:04:59" (1/3) ... [2020-08-18 13:04:59,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e964c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 01:04:59, skipping insertion in model container [2020-08-18 13:04:59,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:04:59" (2/3) ... [2020-08-18 13:04:59,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e964c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 01:04:59, skipping insertion in model container [2020-08-18 13:04:59,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 01:04:59" (3/3) ... [2020-08-18 13:04:59,961 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_1_variant.i [2020-08-18 13:04:59,971 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 13:04:59,979 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 13:04:59,993 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 13:05:00,016 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 13:05:00,016 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 13:05:00,016 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 13:05:00,016 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 13:05:00,016 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 13:05:00,016 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 13:05:00,016 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 13:05:00,017 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 13:05:00,031 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-18 13:05:00,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 13:05:00,037 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:00,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:00,038 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:00,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:00,043 INFO L82 PathProgramCache]: Analyzing trace with hash 651998901, now seen corresponding path program 1 times [2020-08-18 13:05:00,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:00,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427277381] [2020-08-18 13:05:00,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:00,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:00,252 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 13:05:00,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427277381] [2020-08-18 13:05:00,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:05:00,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 13:05:00,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885444873] [2020-08-18 13:05:00,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 13:05:00,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:00,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 13:05:00,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:05:00,283 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-08-18 13:05:00,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:00,388 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-08-18 13:05:00,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 13:05:00,391 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-18 13:05:00,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:00,401 INFO L225 Difference]: With dead ends: 40 [2020-08-18 13:05:00,401 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 13:05:00,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 13:05:00,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 13:05:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-18 13:05:00,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-18 13:05:00,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-08-18 13:05:00,454 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 10 [2020-08-18 13:05:00,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:00,454 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-08-18 13:05:00,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 13:05:00,455 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-08-18 13:05:00,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 13:05:00,456 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:00,456 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:00,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 13:05:00,457 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:00,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:00,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1822329080, now seen corresponding path program 1 times [2020-08-18 13:05:00,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:00,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330048923] [2020-08-18 13:05:00,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:00,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:00,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:00,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:05:00,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330048923] [2020-08-18 13:05:00,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:00,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 13:05:00,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606307898] [2020-08-18 13:05:00,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 13:05:00,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:00,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 13:05:00,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 13:05:00,553 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 6 states. [2020-08-18 13:05:00,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:00,631 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-08-18 13:05:00,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 13:05:00,633 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-08-18 13:05:00,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:00,635 INFO L225 Difference]: With dead ends: 30 [2020-08-18 13:05:00,635 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 13:05:00,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 13:05:00,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 13:05:00,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-18 13:05:00,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 13:05:00,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-08-18 13:05:00,654 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 17 [2020-08-18 13:05:00,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:00,655 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-08-18 13:05:00,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 13:05:00,656 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-08-18 13:05:00,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 13:05:00,657 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:00,658 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:00,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 13:05:00,660 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:00,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:00,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1510359893, now seen corresponding path program 2 times [2020-08-18 13:05:00,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:00,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31383611] [2020-08-18 13:05:00,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:00,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:00,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:00,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 13:05:00,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31383611] [2020-08-18 13:05:00,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:00,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 13:05:00,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478881572] [2020-08-18 13:05:00,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 13:05:00,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:00,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 13:05:00,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 13:05:00,820 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 7 states. [2020-08-18 13:05:00,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:00,890 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-08-18 13:05:00,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 13:05:00,891 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-08-18 13:05:00,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:00,892 INFO L225 Difference]: With dead ends: 37 [2020-08-18 13:05:00,892 INFO L226 Difference]: Without dead ends: 35 [2020-08-18 13:05:00,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-18 13:05:00,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-18 13:05:00,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-08-18 13:05:00,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 13:05:00,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-08-18 13:05:00,902 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2020-08-18 13:05:00,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:00,903 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-08-18 13:05:00,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 13:05:00,903 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-08-18 13:05:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 13:05:00,904 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:00,904 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:00,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 13:05:00,905 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:00,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:00,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1096709736, now seen corresponding path program 3 times [2020-08-18 13:05:00,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:00,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598943773] [2020-08-18 13:05:00,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:01,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-18 13:05:01,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598943773] [2020-08-18 13:05:01,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:01,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 13:05:01,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880013139] [2020-08-18 13:05:01,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 13:05:01,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:01,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 13:05:01,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 13:05:01,034 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 8 states. [2020-08-18 13:05:01,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:01,117 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-08-18 13:05:01,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 13:05:01,130 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-18 13:05:01,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:01,132 INFO L225 Difference]: With dead ends: 44 [2020-08-18 13:05:01,132 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 13:05:01,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-18 13:05:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 13:05:01,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-18 13:05:01,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-18 13:05:01,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-08-18 13:05:01,141 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 31 [2020-08-18 13:05:01,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:01,141 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-08-18 13:05:01,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 13:05:01,141 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-08-18 13:05:01,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-18 13:05:01,143 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:01,143 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:01,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 13:05:01,144 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:01,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:01,144 INFO L82 PathProgramCache]: Analyzing trace with hash 2024617973, now seen corresponding path program 4 times [2020-08-18 13:05:01,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:01,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209560418] [2020-08-18 13:05:01,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-08-18 13:05:01,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209560418] [2020-08-18 13:05:01,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:01,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 13:05:01,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206757083] [2020-08-18 13:05:01,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 13:05:01,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:01,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 13:05:01,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 13:05:01,261 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 9 states. [2020-08-18 13:05:01,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:01,355 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-08-18 13:05:01,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 13:05:01,356 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-18 13:05:01,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:01,357 INFO L225 Difference]: With dead ends: 51 [2020-08-18 13:05:01,357 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 13:05:01,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-18 13:05:01,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 13:05:01,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-08-18 13:05:01,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 13:05:01,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-08-18 13:05:01,368 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 38 [2020-08-18 13:05:01,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:01,368 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-08-18 13:05:01,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 13:05:01,369 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-08-18 13:05:01,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 13:05:01,370 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:01,370 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:01,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 13:05:01,371 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:01,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:01,371 INFO L82 PathProgramCache]: Analyzing trace with hash 125373896, now seen corresponding path program 5 times [2020-08-18 13:05:01,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:01,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881465849] [2020-08-18 13:05:01,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-18 13:05:01,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881465849] [2020-08-18 13:05:01,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:01,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 13:05:01,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478851561] [2020-08-18 13:05:01,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 13:05:01,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:01,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 13:05:01,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 13:05:01,493 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 10 states. [2020-08-18 13:05:01,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:01,583 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-08-18 13:05:01,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 13:05:01,583 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-08-18 13:05:01,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:01,585 INFO L225 Difference]: With dead ends: 58 [2020-08-18 13:05:01,585 INFO L226 Difference]: Without dead ends: 56 [2020-08-18 13:05:01,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-08-18 13:05:01,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-18 13:05:01,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-08-18 13:05:01,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 13:05:01,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-08-18 13:05:01,595 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 45 [2020-08-18 13:05:01,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:01,595 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-08-18 13:05:01,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 13:05:01,599 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-08-18 13:05:01,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 13:05:01,600 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:01,601 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:01,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 13:05:01,601 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:01,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:01,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1195086997, now seen corresponding path program 6 times [2020-08-18 13:05:01,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:01,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567964426] [2020-08-18 13:05:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-08-18 13:05:01,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567964426] [2020-08-18 13:05:01,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:01,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 13:05:01,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691701238] [2020-08-18 13:05:01,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 13:05:01,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:01,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 13:05:01,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-18 13:05:01,821 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 11 states. [2020-08-18 13:05:01,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:01,937 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-08-18 13:05:01,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 13:05:01,938 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-08-18 13:05:01,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:01,940 INFO L225 Difference]: With dead ends: 65 [2020-08-18 13:05:01,940 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 13:05:01,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-18 13:05:01,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 13:05:01,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-08-18 13:05:01,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-18 13:05:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-08-18 13:05:01,956 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 52 [2020-08-18 13:05:01,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:01,956 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-08-18 13:05:01,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 13:05:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-08-18 13:05:01,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 13:05:01,963 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:01,966 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:01,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 13:05:01,966 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:01,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:01,967 INFO L82 PathProgramCache]: Analyzing trace with hash 906444072, now seen corresponding path program 7 times [2020-08-18 13:05:01,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:01,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536311273] [2020-08-18 13:05:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:01,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 14 proven. 77 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-18 13:05:02,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536311273] [2020-08-18 13:05:02,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:02,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 13:05:02,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596388302] [2020-08-18 13:05:02,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 13:05:02,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:02,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 13:05:02,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-18 13:05:02,173 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 12 states. [2020-08-18 13:05:02,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:02,278 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-08-18 13:05:02,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 13:05:02,278 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-08-18 13:05:02,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:02,280 INFO L225 Difference]: With dead ends: 72 [2020-08-18 13:05:02,280 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 13:05:02,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-08-18 13:05:02,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 13:05:02,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-08-18 13:05:02,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 13:05:02,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-08-18 13:05:02,289 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 59 [2020-08-18 13:05:02,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:02,290 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-08-18 13:05:02,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 13:05:02,290 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-08-18 13:05:02,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 13:05:02,291 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:02,291 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:02,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 13:05:02,292 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:02,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:02,292 INFO L82 PathProgramCache]: Analyzing trace with hash -2003085003, now seen corresponding path program 8 times [2020-08-18 13:05:02,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:02,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135053875] [2020-08-18 13:05:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 16 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-08-18 13:05:02,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135053875] [2020-08-18 13:05:02,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:02,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 13:05:02,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617166024] [2020-08-18 13:05:02,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 13:05:02,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:02,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 13:05:02,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-18 13:05:02,427 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 13 states. [2020-08-18 13:05:02,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:02,534 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2020-08-18 13:05:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 13:05:02,535 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-08-18 13:05:02,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:02,536 INFO L225 Difference]: With dead ends: 79 [2020-08-18 13:05:02,536 INFO L226 Difference]: Without dead ends: 77 [2020-08-18 13:05:02,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-08-18 13:05:02,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-08-18 13:05:02,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-08-18 13:05:02,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 13:05:02,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-08-18 13:05:02,546 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 66 [2020-08-18 13:05:02,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:02,546 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-08-18 13:05:02,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 13:05:02,547 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-08-18 13:05:02,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 13:05:02,548 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:02,548 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:02,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 13:05:02,548 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:02,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:02,549 INFO L82 PathProgramCache]: Analyzing trace with hash -824245112, now seen corresponding path program 9 times [2020-08-18 13:05:02,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:02,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102645346] [2020-08-18 13:05:02,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:02,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 18 proven. 126 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-08-18 13:05:02,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102645346] [2020-08-18 13:05:02,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:02,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 13:05:02,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181492660] [2020-08-18 13:05:02,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 13:05:02,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:02,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 13:05:02,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-18 13:05:02,723 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 14 states. [2020-08-18 13:05:02,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:02,838 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-08-18 13:05:02,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 13:05:02,838 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-08-18 13:05:02,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:02,840 INFO L225 Difference]: With dead ends: 86 [2020-08-18 13:05:02,840 INFO L226 Difference]: Without dead ends: 84 [2020-08-18 13:05:02,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-08-18 13:05:02,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-18 13:05:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-08-18 13:05:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-18 13:05:02,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-08-18 13:05:02,850 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 73 [2020-08-18 13:05:02,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:02,851 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-08-18 13:05:02,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 13:05:02,851 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-08-18 13:05:02,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-18 13:05:02,852 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:02,852 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:02,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 13:05:02,853 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:02,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:02,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1640593963, now seen corresponding path program 10 times [2020-08-18 13:05:02,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:02,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599617092] [2020-08-18 13:05:02,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-08-18 13:05:03,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599617092] [2020-08-18 13:05:03,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:03,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 13:05:03,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692908056] [2020-08-18 13:05:03,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 13:05:03,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:03,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 13:05:03,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-18 13:05:03,035 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 15 states. [2020-08-18 13:05:03,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:03,153 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2020-08-18 13:05:03,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 13:05:03,154 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2020-08-18 13:05:03,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:03,155 INFO L225 Difference]: With dead ends: 93 [2020-08-18 13:05:03,155 INFO L226 Difference]: Without dead ends: 91 [2020-08-18 13:05:03,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-18 13:05:03,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-18 13:05:03,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-08-18 13:05:03,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-18 13:05:03,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2020-08-18 13:05:03,164 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 80 [2020-08-18 13:05:03,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:03,164 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2020-08-18 13:05:03,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 13:05:03,164 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2020-08-18 13:05:03,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-18 13:05:03,165 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:03,166 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:03,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 13:05:03,166 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:03,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:03,166 INFO L82 PathProgramCache]: Analyzing trace with hash -447323160, now seen corresponding path program 11 times [2020-08-18 13:05:03,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:03,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579747638] [2020-08-18 13:05:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 22 proven. 187 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-08-18 13:05:03,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579747638] [2020-08-18 13:05:03,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:03,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 13:05:03,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216623746] [2020-08-18 13:05:03,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 13:05:03,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:03,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 13:05:03,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-18 13:05:03,355 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 16 states. [2020-08-18 13:05:03,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:03,525 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-08-18 13:05:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 13:05:03,526 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-18 13:05:03,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:03,528 INFO L225 Difference]: With dead ends: 100 [2020-08-18 13:05:03,528 INFO L226 Difference]: Without dead ends: 98 [2020-08-18 13:05:03,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2020-08-18 13:05:03,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-18 13:05:03,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-08-18 13:05:03,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-18 13:05:03,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-08-18 13:05:03,537 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 87 [2020-08-18 13:05:03,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:03,538 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-08-18 13:05:03,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 13:05:03,538 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-08-18 13:05:03,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-18 13:05:03,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:03,540 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:03,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 13:05:03,540 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:03,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:03,541 INFO L82 PathProgramCache]: Analyzing trace with hash 670505589, now seen corresponding path program 12 times [2020-08-18 13:05:03,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:03,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013948647] [2020-08-18 13:05:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 24 proven. 222 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-18 13:05:03,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013948647] [2020-08-18 13:05:03,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:03,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 13:05:03,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034175951] [2020-08-18 13:05:03,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 13:05:03,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:03,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 13:05:03,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-18 13:05:03,807 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 17 states. [2020-08-18 13:05:03,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:03,973 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2020-08-18 13:05:03,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 13:05:03,974 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 94 [2020-08-18 13:05:03,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:03,975 INFO L225 Difference]: With dead ends: 107 [2020-08-18 13:05:03,975 INFO L226 Difference]: Without dead ends: 105 [2020-08-18 13:05:03,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2020-08-18 13:05:03,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-18 13:05:03,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-08-18 13:05:03,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-18 13:05:03,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2020-08-18 13:05:03,983 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 94 [2020-08-18 13:05:03,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:03,984 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2020-08-18 13:05:03,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 13:05:03,984 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2020-08-18 13:05:03,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-18 13:05:03,985 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:03,986 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:03,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 13:05:03,986 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:03,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:03,987 INFO L82 PathProgramCache]: Analyzing trace with hash -29140152, now seen corresponding path program 13 times [2020-08-18 13:05:03,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:03,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102650468] [2020-08-18 13:05:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 26 proven. 260 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-08-18 13:05:04,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102650468] [2020-08-18 13:05:04,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:04,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 13:05:04,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506265430] [2020-08-18 13:05:04,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 13:05:04,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:04,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 13:05:04,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-18 13:05:04,208 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 18 states. [2020-08-18 13:05:04,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:04,348 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-08-18 13:05:04,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 13:05:04,348 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2020-08-18 13:05:04,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:04,350 INFO L225 Difference]: With dead ends: 114 [2020-08-18 13:05:04,350 INFO L226 Difference]: Without dead ends: 112 [2020-08-18 13:05:04,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2020-08-18 13:05:04,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-18 13:05:04,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-08-18 13:05:04,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-18 13:05:04,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-08-18 13:05:04,359 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 101 [2020-08-18 13:05:04,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:04,359 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-08-18 13:05:04,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 13:05:04,360 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-08-18 13:05:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-18 13:05:04,361 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:04,361 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:04,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 13:05:04,362 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:04,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:04,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1538844907, now seen corresponding path program 14 times [2020-08-18 13:05:04,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:04,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588635812] [2020-08-18 13:05:04,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:04,626 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 28 proven. 301 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-08-18 13:05:04,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588635812] [2020-08-18 13:05:04,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:04,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 13:05:04,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413112876] [2020-08-18 13:05:04,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 13:05:04,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:04,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 13:05:04,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-18 13:05:04,629 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 19 states. [2020-08-18 13:05:04,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:04,803 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2020-08-18 13:05:04,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 13:05:04,804 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 108 [2020-08-18 13:05:04,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:04,805 INFO L225 Difference]: With dead ends: 121 [2020-08-18 13:05:04,806 INFO L226 Difference]: Without dead ends: 119 [2020-08-18 13:05:04,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2020-08-18 13:05:04,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-08-18 13:05:04,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-08-18 13:05:04,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-08-18 13:05:04,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2020-08-18 13:05:04,820 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 108 [2020-08-18 13:05:04,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:04,820 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2020-08-18 13:05:04,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 13:05:04,821 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2020-08-18 13:05:04,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-18 13:05:04,822 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:04,822 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:04,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 13:05:04,822 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:04,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:04,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1878780584, now seen corresponding path program 15 times [2020-08-18 13:05:04,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:04,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972569070] [2020-08-18 13:05:04,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 30 proven. 345 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-08-18 13:05:05,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972569070] [2020-08-18 13:05:05,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:05,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 13:05:05,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863289136] [2020-08-18 13:05:05,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 13:05:05,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:05,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 13:05:05,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-18 13:05:05,112 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 20 states. [2020-08-18 13:05:05,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:05,293 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-08-18 13:05:05,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 13:05:05,293 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 115 [2020-08-18 13:05:05,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:05,295 INFO L225 Difference]: With dead ends: 128 [2020-08-18 13:05:05,295 INFO L226 Difference]: Without dead ends: 126 [2020-08-18 13:05:05,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2020-08-18 13:05:05,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-18 13:05:05,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-08-18 13:05:05,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-18 13:05:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2020-08-18 13:05:05,306 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 115 [2020-08-18 13:05:05,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:05,307 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2020-08-18 13:05:05,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 13:05:05,307 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2020-08-18 13:05:05,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-18 13:05:05,308 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:05,309 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:05,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 13:05:05,309 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:05,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:05,310 INFO L82 PathProgramCache]: Analyzing trace with hash 269515701, now seen corresponding path program 16 times [2020-08-18 13:05:05,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:05,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352320605] [2020-08-18 13:05:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 32 proven. 392 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-08-18 13:05:05,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352320605] [2020-08-18 13:05:05,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:05,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 13:05:05,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786662830] [2020-08-18 13:05:05,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 13:05:05,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:05,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 13:05:05,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-18 13:05:05,639 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 21 states. [2020-08-18 13:05:05,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:05,821 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2020-08-18 13:05:05,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 13:05:05,822 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 122 [2020-08-18 13:05:05,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:05,823 INFO L225 Difference]: With dead ends: 135 [2020-08-18 13:05:05,823 INFO L226 Difference]: Without dead ends: 133 [2020-08-18 13:05:05,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2020-08-18 13:05:05,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-18 13:05:05,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-08-18 13:05:05,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-18 13:05:05,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2020-08-18 13:05:05,834 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 122 [2020-08-18 13:05:05,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:05,837 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2020-08-18 13:05:05,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 13:05:05,837 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2020-08-18 13:05:05,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-08-18 13:05:05,838 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:05,839 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:05,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 13:05:05,839 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:05,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:05,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1034546680, now seen corresponding path program 17 times [2020-08-18 13:05:05,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:05,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586806080] [2020-08-18 13:05:05,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 34 proven. 442 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-08-18 13:05:06,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586806080] [2020-08-18 13:05:06,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:06,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 13:05:06,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304234355] [2020-08-18 13:05:06,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 13:05:06,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:06,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 13:05:06,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-18 13:05:06,204 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 22 states. [2020-08-18 13:05:06,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:06,379 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2020-08-18 13:05:06,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 13:05:06,379 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 129 [2020-08-18 13:05:06,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:06,382 INFO L225 Difference]: With dead ends: 142 [2020-08-18 13:05:06,382 INFO L226 Difference]: Without dead ends: 140 [2020-08-18 13:05:06,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-08-18 13:05:06,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-18 13:05:06,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-08-18 13:05:06,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-08-18 13:05:06,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2020-08-18 13:05:06,390 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 129 [2020-08-18 13:05:06,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:06,391 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2020-08-18 13:05:06,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 13:05:06,391 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2020-08-18 13:05:06,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-18 13:05:06,392 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:06,392 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:06,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 13:05:06,393 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:06,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:06,393 INFO L82 PathProgramCache]: Analyzing trace with hash -2034415531, now seen corresponding path program 18 times [2020-08-18 13:05:06,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:06,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690973381] [2020-08-18 13:05:06,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 36 proven. 495 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-08-18 13:05:06,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690973381] [2020-08-18 13:05:06,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:06,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 13:05:06,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346935677] [2020-08-18 13:05:06,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 13:05:06,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:06,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 13:05:06,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-18 13:05:06,715 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 23 states. [2020-08-18 13:05:06,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:06,910 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2020-08-18 13:05:06,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 13:05:06,911 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 136 [2020-08-18 13:05:06,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:06,912 INFO L225 Difference]: With dead ends: 149 [2020-08-18 13:05:06,912 INFO L226 Difference]: Without dead ends: 147 [2020-08-18 13:05:06,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2020-08-18 13:05:06,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-08-18 13:05:06,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2020-08-18 13:05:06,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-18 13:05:06,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2020-08-18 13:05:06,922 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 136 [2020-08-18 13:05:06,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:06,923 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2020-08-18 13:05:06,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 13:05:06,923 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2020-08-18 13:05:06,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-18 13:05:06,924 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:06,924 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:06,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 13:05:06,925 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:06,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:06,925 INFO L82 PathProgramCache]: Analyzing trace with hash 245879144, now seen corresponding path program 19 times [2020-08-18 13:05:06,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:06,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563691438] [2020-08-18 13:05:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:07,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 38 proven. 551 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-08-18 13:05:07,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563691438] [2020-08-18 13:05:07,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:07,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 13:05:07,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632948165] [2020-08-18 13:05:07,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 13:05:07,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:07,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 13:05:07,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-18 13:05:07,370 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 24 states. [2020-08-18 13:05:07,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:07,647 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2020-08-18 13:05:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 13:05:07,649 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 143 [2020-08-18 13:05:07,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:07,650 INFO L225 Difference]: With dead ends: 156 [2020-08-18 13:05:07,650 INFO L226 Difference]: Without dead ends: 154 [2020-08-18 13:05:07,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2020-08-18 13:05:07,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-18 13:05:07,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-08-18 13:05:07,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-08-18 13:05:07,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2020-08-18 13:05:07,662 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 143 [2020-08-18 13:05:07,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:07,662 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2020-08-18 13:05:07,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 13:05:07,663 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2020-08-18 13:05:07,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-18 13:05:07,665 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:07,665 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:07,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 13:05:07,666 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:07,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:07,666 INFO L82 PathProgramCache]: Analyzing trace with hash -499680011, now seen corresponding path program 20 times [2020-08-18 13:05:07,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:07,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128927976] [2020-08-18 13:05:07,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 40 proven. 610 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-08-18 13:05:08,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128927976] [2020-08-18 13:05:08,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:08,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 13:05:08,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172803917] [2020-08-18 13:05:08,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 13:05:08,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:08,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 13:05:08,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-18 13:05:08,329 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 25 states. [2020-08-18 13:05:08,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:08,531 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2020-08-18 13:05:08,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 13:05:08,532 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 150 [2020-08-18 13:05:08,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:08,533 INFO L225 Difference]: With dead ends: 163 [2020-08-18 13:05:08,533 INFO L226 Difference]: Without dead ends: 161 [2020-08-18 13:05:08,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2020-08-18 13:05:08,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-08-18 13:05:08,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-08-18 13:05:08,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-18 13:05:08,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2020-08-18 13:05:08,544 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 150 [2020-08-18 13:05:08,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:08,546 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2020-08-18 13:05:08,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 13:05:08,546 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2020-08-18 13:05:08,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-18 13:05:08,547 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:08,547 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:08,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 13:05:08,548 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:08,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:08,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1606887624, now seen corresponding path program 21 times [2020-08-18 13:05:08,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:08,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399131946] [2020-08-18 13:05:08,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:08,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 42 proven. 672 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-08-18 13:05:08,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399131946] [2020-08-18 13:05:08,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:08,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 13:05:08,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292304895] [2020-08-18 13:05:08,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 13:05:08,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:08,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 13:05:08,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-18 13:05:08,952 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 26 states. [2020-08-18 13:05:09,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:09,182 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2020-08-18 13:05:09,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 13:05:09,182 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 157 [2020-08-18 13:05:09,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:09,184 INFO L225 Difference]: With dead ends: 170 [2020-08-18 13:05:09,184 INFO L226 Difference]: Without dead ends: 168 [2020-08-18 13:05:09,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2020-08-18 13:05:09,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-18 13:05:09,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2020-08-18 13:05:09,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-18 13:05:09,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2020-08-18 13:05:09,192 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 157 [2020-08-18 13:05:09,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:09,192 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2020-08-18 13:05:09,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 13:05:09,193 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2020-08-18 13:05:09,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-08-18 13:05:09,194 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:09,194 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:09,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 13:05:09,194 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:09,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:09,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1525225877, now seen corresponding path program 22 times [2020-08-18 13:05:09,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:09,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374726923] [2020-08-18 13:05:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:09,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:09,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 44 proven. 737 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-08-18 13:05:09,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374726923] [2020-08-18 13:05:09,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:09,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 13:05:09,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084595194] [2020-08-18 13:05:09,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 13:05:09,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:09,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 13:05:09,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-18 13:05:09,715 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 27 states. [2020-08-18 13:05:09,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:09,994 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2020-08-18 13:05:09,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 13:05:09,994 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 164 [2020-08-18 13:05:09,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:09,996 INFO L225 Difference]: With dead ends: 177 [2020-08-18 13:05:09,996 INFO L226 Difference]: Without dead ends: 175 [2020-08-18 13:05:09,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2020-08-18 13:05:09,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-08-18 13:05:10,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2020-08-18 13:05:10,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-18 13:05:10,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2020-08-18 13:05:10,004 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 164 [2020-08-18 13:05:10,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:10,004 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2020-08-18 13:05:10,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 13:05:10,004 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2020-08-18 13:05:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-08-18 13:05:10,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:10,006 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:10,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 13:05:10,006 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:10,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:10,006 INFO L82 PathProgramCache]: Analyzing trace with hash 302651432, now seen corresponding path program 23 times [2020-08-18 13:05:10,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:10,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806424269] [2020-08-18 13:05:10,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:10,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:10,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 46 proven. 805 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-08-18 13:05:10,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806424269] [2020-08-18 13:05:10,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:10,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 13:05:10,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728417576] [2020-08-18 13:05:10,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 13:05:10,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:10,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 13:05:10,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-18 13:05:10,499 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 28 states. [2020-08-18 13:05:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:10,752 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2020-08-18 13:05:10,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-18 13:05:10,754 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 171 [2020-08-18 13:05:10,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:10,755 INFO L225 Difference]: With dead ends: 184 [2020-08-18 13:05:10,755 INFO L226 Difference]: Without dead ends: 182 [2020-08-18 13:05:10,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2020-08-18 13:05:10,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-08-18 13:05:10,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-08-18 13:05:10,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-08-18 13:05:10,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2020-08-18 13:05:10,768 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 171 [2020-08-18 13:05:10,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:10,768 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2020-08-18 13:05:10,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 13:05:10,768 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2020-08-18 13:05:10,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-08-18 13:05:10,770 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:10,770 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:10,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 13:05:10,771 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:10,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:10,772 INFO L82 PathProgramCache]: Analyzing trace with hash 666639925, now seen corresponding path program 24 times [2020-08-18 13:05:10,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:10,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881071627] [2020-08-18 13:05:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:11,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:11,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 48 proven. 876 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-08-18 13:05:11,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881071627] [2020-08-18 13:05:11,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:11,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-18 13:05:11,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849810661] [2020-08-18 13:05:11,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-18 13:05:11,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:11,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-18 13:05:11,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-18 13:05:11,274 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 29 states. [2020-08-18 13:05:11,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:11,571 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2020-08-18 13:05:11,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-18 13:05:11,574 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 178 [2020-08-18 13:05:11,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:11,576 INFO L225 Difference]: With dead ends: 191 [2020-08-18 13:05:11,576 INFO L226 Difference]: Without dead ends: 189 [2020-08-18 13:05:11,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2020-08-18 13:05:11,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-08-18 13:05:11,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2020-08-18 13:05:11,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-18 13:05:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2020-08-18 13:05:11,585 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 178 [2020-08-18 13:05:11,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:11,585 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2020-08-18 13:05:11,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-18 13:05:11,585 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2020-08-18 13:05:11,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-08-18 13:05:11,586 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:11,587 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:11,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 13:05:11,587 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:11,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:11,587 INFO L82 PathProgramCache]: Analyzing trace with hash 860266376, now seen corresponding path program 25 times [2020-08-18 13:05:11,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:11,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375533209] [2020-08-18 13:05:11,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:12,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 50 proven. 950 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-08-18 13:05:12,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375533209] [2020-08-18 13:05:12,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:12,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-18 13:05:12,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737735654] [2020-08-18 13:05:12,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-18 13:05:12,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:12,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-18 13:05:12,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-18 13:05:12,131 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 30 states. [2020-08-18 13:05:12,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:12,478 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2020-08-18 13:05:12,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-18 13:05:12,478 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 185 [2020-08-18 13:05:12,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:12,480 INFO L225 Difference]: With dead ends: 198 [2020-08-18 13:05:12,480 INFO L226 Difference]: Without dead ends: 196 [2020-08-18 13:05:12,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2020-08-18 13:05:12,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-18 13:05:12,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2020-08-18 13:05:12,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-08-18 13:05:12,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2020-08-18 13:05:12,489 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 185 [2020-08-18 13:05:12,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:12,490 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2020-08-18 13:05:12,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-18 13:05:12,490 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2020-08-18 13:05:12,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-18 13:05:12,491 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:12,491 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:12,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 13:05:12,491 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:12,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:12,492 INFO L82 PathProgramCache]: Analyzing trace with hash 505055957, now seen corresponding path program 26 times [2020-08-18 13:05:12,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:12,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854230932] [2020-08-18 13:05:12,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 52 proven. 1027 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-08-18 13:05:13,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854230932] [2020-08-18 13:05:13,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:13,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-18 13:05:13,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804191728] [2020-08-18 13:05:13,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-18 13:05:13,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:13,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-18 13:05:13,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-18 13:05:13,086 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 31 states. [2020-08-18 13:05:13,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:13,412 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2020-08-18 13:05:13,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-18 13:05:13,414 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 192 [2020-08-18 13:05:13,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:13,416 INFO L225 Difference]: With dead ends: 205 [2020-08-18 13:05:13,416 INFO L226 Difference]: Without dead ends: 203 [2020-08-18 13:05:13,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2020-08-18 13:05:13,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-08-18 13:05:13,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2020-08-18 13:05:13,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-08-18 13:05:13,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2020-08-18 13:05:13,424 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 192 [2020-08-18 13:05:13,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:13,424 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2020-08-18 13:05:13,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-18 13:05:13,425 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2020-08-18 13:05:13,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-08-18 13:05:13,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:13,426 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:13,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 13:05:13,426 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:13,427 INFO L82 PathProgramCache]: Analyzing trace with hash -489505048, now seen corresponding path program 27 times [2020-08-18 13:05:13,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:13,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537172462] [2020-08-18 13:05:13,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:13,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 54 proven. 1107 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-08-18 13:05:14,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537172462] [2020-08-18 13:05:14,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:14,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-18 13:05:14,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794999802] [2020-08-18 13:05:14,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-18 13:05:14,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:14,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-18 13:05:14,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-18 13:05:14,032 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 32 states. [2020-08-18 13:05:14,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:14,332 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2020-08-18 13:05:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-18 13:05:14,334 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 199 [2020-08-18 13:05:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:14,335 INFO L225 Difference]: With dead ends: 212 [2020-08-18 13:05:14,336 INFO L226 Difference]: Without dead ends: 210 [2020-08-18 13:05:14,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 13:05:14,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-18 13:05:14,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2020-08-18 13:05:14,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-18 13:05:14,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2020-08-18 13:05:14,344 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 199 [2020-08-18 13:05:14,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:14,344 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2020-08-18 13:05:14,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-18 13:05:14,345 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2020-08-18 13:05:14,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-08-18 13:05:14,346 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:14,346 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:14,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 13:05:14,346 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:14,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:14,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1374576501, now seen corresponding path program 28 times [2020-08-18 13:05:14,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:14,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420657165] [2020-08-18 13:05:14,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:14,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:14,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 56 proven. 1190 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-08-18 13:05:15,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420657165] [2020-08-18 13:05:15,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:15,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-18 13:05:15,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007773988] [2020-08-18 13:05:15,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-18 13:05:15,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:15,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-18 13:05:15,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 13:05:15,028 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 33 states. [2020-08-18 13:05:15,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:15,341 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2020-08-18 13:05:15,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-18 13:05:15,341 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 206 [2020-08-18 13:05:15,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:15,343 INFO L225 Difference]: With dead ends: 219 [2020-08-18 13:05:15,343 INFO L226 Difference]: Without dead ends: 217 [2020-08-18 13:05:15,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 13:05:15,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-08-18 13:05:15,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2020-08-18 13:05:15,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-08-18 13:05:15,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 216 transitions. [2020-08-18 13:05:15,354 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 216 transitions. Word has length 206 [2020-08-18 13:05:15,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:15,354 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 216 transitions. [2020-08-18 13:05:15,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-18 13:05:15,354 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 216 transitions. [2020-08-18 13:05:15,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-08-18 13:05:15,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:15,357 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:15,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 13:05:15,358 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:15,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:15,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1316719032, now seen corresponding path program 29 times [2020-08-18 13:05:15,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:15,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870689470] [2020-08-18 13:05:15,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:15,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 58 proven. 1276 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-08-18 13:05:16,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870689470] [2020-08-18 13:05:16,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:16,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-18 13:05:16,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603813428] [2020-08-18 13:05:16,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-18 13:05:16,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:16,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-18 13:05:16,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 13:05:16,008 INFO L87 Difference]: Start difference. First operand 216 states and 216 transitions. Second operand 34 states. [2020-08-18 13:05:16,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:16,364 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2020-08-18 13:05:16,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-18 13:05:16,364 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 213 [2020-08-18 13:05:16,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:16,367 INFO L225 Difference]: With dead ends: 226 [2020-08-18 13:05:16,367 INFO L226 Difference]: Without dead ends: 224 [2020-08-18 13:05:16,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 13:05:16,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-08-18 13:05:16,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2020-08-18 13:05:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-08-18 13:05:16,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2020-08-18 13:05:16,383 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 213 [2020-08-18 13:05:16,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:16,383 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2020-08-18 13:05:16,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-18 13:05:16,383 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2020-08-18 13:05:16,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-08-18 13:05:16,384 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:16,385 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:16,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 13:05:16,385 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:16,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:16,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1247699947, now seen corresponding path program 30 times [2020-08-18 13:05:16,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:16,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670674830] [2020-08-18 13:05:16,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:16,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:16,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:16,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:16,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:16,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:16,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:16,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:16,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:16,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:16,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:16,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:16,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:16,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:16,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:16,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:16,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:16,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:16,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:16,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:17,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:17,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:17,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:17,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:17,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:17,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:17,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:17,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:17,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:17,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:17,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:17,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3165 backedges. 60 proven. 1365 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2020-08-18 13:05:17,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670674830] [2020-08-18 13:05:17,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:17,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-18 13:05:17,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448021486] [2020-08-18 13:05:17,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-18 13:05:17,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:17,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-18 13:05:17,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 13:05:17,067 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 35 states. [2020-08-18 13:05:17,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:17,386 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2020-08-18 13:05:17,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-18 13:05:17,387 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 220 [2020-08-18 13:05:17,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:17,389 INFO L225 Difference]: With dead ends: 233 [2020-08-18 13:05:17,389 INFO L226 Difference]: Without dead ends: 231 [2020-08-18 13:05:17,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 13:05:17,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-08-18 13:05:17,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2020-08-18 13:05:17,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-08-18 13:05:17,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 230 transitions. [2020-08-18 13:05:17,403 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 230 transitions. Word has length 220 [2020-08-18 13:05:17,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:17,404 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 230 transitions. [2020-08-18 13:05:17,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-18 13:05:17,405 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 230 transitions. [2020-08-18 13:05:17,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-08-18 13:05:17,407 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:17,408 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:17,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 13:05:17,408 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:17,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:17,409 INFO L82 PathProgramCache]: Analyzing trace with hash 28427688, now seen corresponding path program 31 times [2020-08-18 13:05:17,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:17,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334463253] [2020-08-18 13:05:17,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 62 proven. 1457 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-08-18 13:05:18,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334463253] [2020-08-18 13:05:18,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:18,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-18 13:05:18,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86740012] [2020-08-18 13:05:18,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-18 13:05:18,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:18,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-18 13:05:18,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 13:05:18,163 INFO L87 Difference]: Start difference. First operand 230 states and 230 transitions. Second operand 36 states. [2020-08-18 13:05:18,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:18,503 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2020-08-18 13:05:18,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-18 13:05:18,503 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 227 [2020-08-18 13:05:18,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:18,506 INFO L225 Difference]: With dead ends: 240 [2020-08-18 13:05:18,506 INFO L226 Difference]: Without dead ends: 238 [2020-08-18 13:05:18,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 13:05:18,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-18 13:05:18,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2020-08-18 13:05:18,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-08-18 13:05:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2020-08-18 13:05:18,515 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 227 [2020-08-18 13:05:18,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:18,516 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2020-08-18 13:05:18,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-18 13:05:18,516 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2020-08-18 13:05:18,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-08-18 13:05:18,517 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:18,517 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:18,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-18 13:05:18,518 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:18,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:18,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1172422475, now seen corresponding path program 32 times [2020-08-18 13:05:18,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:18,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862855051] [2020-08-18 13:05:18,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 13:05:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 64 proven. 1552 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-08-18 13:05:19,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862855051] [2020-08-18 13:05:19,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:19,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-18 13:05:19,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842093388] [2020-08-18 13:05:19,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-18 13:05:19,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:19,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-18 13:05:19,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 13:05:19,289 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 37 states. [2020-08-18 13:05:19,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:19,698 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2020-08-18 13:05:19,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-18 13:05:19,699 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 234 [2020-08-18 13:05:19,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:19,702 INFO L225 Difference]: With dead ends: 247 [2020-08-18 13:05:19,702 INFO L226 Difference]: Without dead ends: 245 [2020-08-18 13:05:19,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 13:05:19,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-08-18 13:05:19,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2020-08-18 13:05:19,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-08-18 13:05:19,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2020-08-18 13:05:19,714 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 234 [2020-08-18 13:05:19,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:19,715 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2020-08-18 13:05:19,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-18 13:05:19,715 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2020-08-18 13:05:19,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-08-18 13:05:19,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:19,718 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:19,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-18 13:05:19,719 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:19,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:19,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1731243272, now seen corresponding path program 33 times [2020-08-18 13:05:19,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:19,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035123550] [2020-08-18 13:05:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 13:05:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 13:05:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 66 proven. 1650 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2020-08-18 13:05:20,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035123550] [2020-08-18 13:05:20,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:20,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-18 13:05:20,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899764269] [2020-08-18 13:05:20,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-18 13:05:20,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:20,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-18 13:05:20,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 13:05:20,543 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 38 states. [2020-08-18 13:05:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:20,941 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2020-08-18 13:05:20,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-18 13:05:20,942 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 241 [2020-08-18 13:05:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:20,944 INFO L225 Difference]: With dead ends: 254 [2020-08-18 13:05:20,944 INFO L226 Difference]: Without dead ends: 252 [2020-08-18 13:05:20,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2020-08-18 13:05:20,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-08-18 13:05:20,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2020-08-18 13:05:20,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-08-18 13:05:20,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2020-08-18 13:05:20,953 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 241 [2020-08-18 13:05:20,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:20,954 INFO L479 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2020-08-18 13:05:20,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-18 13:05:20,954 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2020-08-18 13:05:20,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-08-18 13:05:20,956 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:20,956 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:20,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-18 13:05:20,956 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:20,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:20,957 INFO L82 PathProgramCache]: Analyzing trace with hash -288469675, now seen corresponding path program 34 times [2020-08-18 13:05:20,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:20,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065200477] [2020-08-18 13:05:20,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 13:05:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 13:05:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 13:05:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4063 backedges. 68 proven. 1751 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-08-18 13:05:21,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065200477] [2020-08-18 13:05:21,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:21,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-18 13:05:21,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034303217] [2020-08-18 13:05:21,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-18 13:05:21,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:21,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-18 13:05:21,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2020-08-18 13:05:21,784 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 39 states. [2020-08-18 13:05:22,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:22,185 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2020-08-18 13:05:22,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-18 13:05:22,186 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 248 [2020-08-18 13:05:22,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:22,187 INFO L225 Difference]: With dead ends: 261 [2020-08-18 13:05:22,187 INFO L226 Difference]: Without dead ends: 259 [2020-08-18 13:05:22,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2020-08-18 13:05:22,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-18 13:05:22,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2020-08-18 13:05:22,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-08-18 13:05:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 258 transitions. [2020-08-18 13:05:22,196 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 258 transitions. Word has length 248 [2020-08-18 13:05:22,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:22,197 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 258 transitions. [2020-08-18 13:05:22,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-18 13:05:22,197 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 258 transitions. [2020-08-18 13:05:22,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-08-18 13:05:22,198 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:22,199 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:22,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-18 13:05:22,199 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:22,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:22,199 INFO L82 PathProgramCache]: Analyzing trace with hash 123153512, now seen corresponding path program 35 times [2020-08-18 13:05:22,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:22,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936180932] [2020-08-18 13:05:22,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:22,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:22,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:22,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:22,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:22,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:22,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:22,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:22,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:22,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:23,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 13:05:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 13:05:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 13:05:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 13:05:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 70 proven. 1855 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-08-18 13:05:23,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936180932] [2020-08-18 13:05:23,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:23,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-18 13:05:23,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113378776] [2020-08-18 13:05:23,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-18 13:05:23,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:23,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-18 13:05:23,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2020-08-18 13:05:23,083 INFO L87 Difference]: Start difference. First operand 258 states and 258 transitions. Second operand 40 states. [2020-08-18 13:05:23,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:23,475 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2020-08-18 13:05:23,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-18 13:05:23,475 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 255 [2020-08-18 13:05:23,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:23,477 INFO L225 Difference]: With dead ends: 268 [2020-08-18 13:05:23,478 INFO L226 Difference]: Without dead ends: 266 [2020-08-18 13:05:23,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2020-08-18 13:05:23,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-08-18 13:05:23,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2020-08-18 13:05:23,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-18 13:05:23,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2020-08-18 13:05:23,488 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 255 [2020-08-18 13:05:23,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:23,489 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2020-08-18 13:05:23,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-18 13:05:23,489 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2020-08-18 13:05:23,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-08-18 13:05:23,490 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:23,491 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:23,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-18 13:05:23,491 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:23,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:23,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1583627787, now seen corresponding path program 36 times [2020-08-18 13:05:23,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:23,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921038022] [2020-08-18 13:05:23,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:24,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 13:05:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 13:05:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 13:05:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 13:05:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 13:05:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4554 backedges. 72 proven. 1962 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2020-08-18 13:05:24,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921038022] [2020-08-18 13:05:24,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:24,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-18 13:05:24,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936499417] [2020-08-18 13:05:24,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-18 13:05:24,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:24,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-18 13:05:24,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2020-08-18 13:05:24,439 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand 41 states. [2020-08-18 13:05:24,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:24,884 INFO L93 Difference]: Finished difference Result 275 states and 275 transitions. [2020-08-18 13:05:24,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-18 13:05:24,884 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 262 [2020-08-18 13:05:24,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:24,886 INFO L225 Difference]: With dead ends: 275 [2020-08-18 13:05:24,886 INFO L226 Difference]: Without dead ends: 273 [2020-08-18 13:05:24,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=749, Invalid=973, Unknown=0, NotChecked=0, Total=1722 [2020-08-18 13:05:24,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-08-18 13:05:24,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2020-08-18 13:05:24,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-08-18 13:05:24,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 272 transitions. [2020-08-18 13:05:24,897 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 272 transitions. Word has length 262 [2020-08-18 13:05:24,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:24,897 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 272 transitions. [2020-08-18 13:05:24,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-18 13:05:24,897 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 272 transitions. [2020-08-18 13:05:24,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-08-18 13:05:24,899 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:24,899 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:24,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-18 13:05:24,900 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:24,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:24,900 INFO L82 PathProgramCache]: Analyzing trace with hash -117750840, now seen corresponding path program 37 times [2020-08-18 13:05:24,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:24,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114671366] [2020-08-18 13:05:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:25,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 13:05:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 13:05:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 13:05:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 13:05:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 13:05:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 13:05:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 74 proven. 2072 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2020-08-18 13:05:25,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114671366] [2020-08-18 13:05:25,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:25,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-18 13:05:25,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360144784] [2020-08-18 13:05:25,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-18 13:05:25,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:25,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-18 13:05:25,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2020-08-18 13:05:25,895 INFO L87 Difference]: Start difference. First operand 272 states and 272 transitions. Second operand 42 states. [2020-08-18 13:05:26,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:26,315 INFO L93 Difference]: Finished difference Result 282 states and 282 transitions. [2020-08-18 13:05:26,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-18 13:05:26,316 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 269 [2020-08-18 13:05:26,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:26,317 INFO L225 Difference]: With dead ends: 282 [2020-08-18 13:05:26,317 INFO L226 Difference]: Without dead ends: 280 [2020-08-18 13:05:26,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2020-08-18 13:05:26,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-18 13:05:26,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 279. [2020-08-18 13:05:26,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-08-18 13:05:26,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 279 transitions. [2020-08-18 13:05:26,326 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 279 transitions. Word has length 269 [2020-08-18 13:05:26,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:26,327 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 279 transitions. [2020-08-18 13:05:26,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-18 13:05:26,327 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 279 transitions. [2020-08-18 13:05:26,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-08-18 13:05:26,328 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:26,329 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:26,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-18 13:05:26,329 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:26,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:26,329 INFO L82 PathProgramCache]: Analyzing trace with hash 2129698453, now seen corresponding path program 38 times [2020-08-18 13:05:26,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:26,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378882354] [2020-08-18 13:05:26,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:26,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:27,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 13:05:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 13:05:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 13:05:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 13:05:27,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 13:05:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 13:05:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 13:05:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5073 backedges. 76 proven. 2185 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2020-08-18 13:05:27,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378882354] [2020-08-18 13:05:27,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:27,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-18 13:05:27,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947924147] [2020-08-18 13:05:27,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-18 13:05:27,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:27,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-18 13:05:27,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=982, Unknown=0, NotChecked=0, Total=1806 [2020-08-18 13:05:27,379 INFO L87 Difference]: Start difference. First operand 279 states and 279 transitions. Second operand 43 states. [2020-08-18 13:05:27,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:27,819 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2020-08-18 13:05:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-18 13:05:27,820 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 276 [2020-08-18 13:05:27,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:27,824 INFO L225 Difference]: With dead ends: 289 [2020-08-18 13:05:27,824 INFO L226 Difference]: Without dead ends: 287 [2020-08-18 13:05:27,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=828, Invalid=1064, Unknown=0, NotChecked=0, Total=1892 [2020-08-18 13:05:27,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-08-18 13:05:27,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2020-08-18 13:05:27,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-08-18 13:05:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 286 transitions. [2020-08-18 13:05:27,839 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 286 transitions. Word has length 276 [2020-08-18 13:05:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:27,839 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 286 transitions. [2020-08-18 13:05:27,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-18 13:05:27,839 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 286 transitions. [2020-08-18 13:05:27,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-08-18 13:05:27,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:27,841 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:27,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-18 13:05:27,842 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:27,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:27,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1535970520, now seen corresponding path program 39 times [2020-08-18 13:05:27,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:27,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286675588] [2020-08-18 13:05:27,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 13:05:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 13:05:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 13:05:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 13:05:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 13:05:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 13:05:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 13:05:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 13:05:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5343 backedges. 78 proven. 2301 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2020-08-18 13:05:28,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286675588] [2020-08-18 13:05:28,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:28,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-18 13:05:28,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557521502] [2020-08-18 13:05:28,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-18 13:05:28,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:28,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-18 13:05:28,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2020-08-18 13:05:28,885 INFO L87 Difference]: Start difference. First operand 286 states and 286 transitions. Second operand 44 states. [2020-08-18 13:05:29,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:29,312 INFO L93 Difference]: Finished difference Result 296 states and 296 transitions. [2020-08-18 13:05:29,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-18 13:05:29,317 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 283 [2020-08-18 13:05:29,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:29,318 INFO L225 Difference]: With dead ends: 296 [2020-08-18 13:05:29,319 INFO L226 Difference]: Without dead ends: 294 [2020-08-18 13:05:29,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=869, Invalid=1111, Unknown=0, NotChecked=0, Total=1980 [2020-08-18 13:05:29,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-08-18 13:05:29,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2020-08-18 13:05:29,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-08-18 13:05:29,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2020-08-18 13:05:29,328 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 283 [2020-08-18 13:05:29,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:29,328 INFO L479 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2020-08-18 13:05:29,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-18 13:05:29,329 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2020-08-18 13:05:29,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-08-18 13:05:29,330 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:29,331 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:29,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-18 13:05:29,331 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:29,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:29,331 INFO L82 PathProgramCache]: Analyzing trace with hash 834069301, now seen corresponding path program 40 times [2020-08-18 13:05:29,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:29,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257461274] [2020-08-18 13:05:29,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:30,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 13:05:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 13:05:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 13:05:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 13:05:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 13:05:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 13:05:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 13:05:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 13:05:30,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 13:05:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5620 backedges. 80 proven. 2420 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2020-08-18 13:05:30,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257461274] [2020-08-18 13:05:30,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:30,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-18 13:05:30,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773557416] [2020-08-18 13:05:30,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-18 13:05:30,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:30,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-18 13:05:30,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=1073, Unknown=0, NotChecked=0, Total=1980 [2020-08-18 13:05:30,420 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand 45 states. [2020-08-18 13:05:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:30,875 INFO L93 Difference]: Finished difference Result 303 states and 303 transitions. [2020-08-18 13:05:30,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-18 13:05:30,876 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 290 [2020-08-18 13:05:30,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:30,878 INFO L225 Difference]: With dead ends: 303 [2020-08-18 13:05:30,878 INFO L226 Difference]: Without dead ends: 301 [2020-08-18 13:05:30,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=911, Invalid=1159, Unknown=0, NotChecked=0, Total=2070 [2020-08-18 13:05:30,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-08-18 13:05:30,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 300. [2020-08-18 13:05:30,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-08-18 13:05:30,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 300 transitions. [2020-08-18 13:05:30,888 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 300 transitions. Word has length 290 [2020-08-18 13:05:30,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:30,889 INFO L479 AbstractCegarLoop]: Abstraction has 300 states and 300 transitions. [2020-08-18 13:05:30,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-18 13:05:30,889 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 300 transitions. [2020-08-18 13:05:30,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-08-18 13:05:30,891 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:30,891 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:30,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-18 13:05:30,892 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:30,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:30,892 INFO L82 PathProgramCache]: Analyzing trace with hash 596916872, now seen corresponding path program 41 times [2020-08-18 13:05:30,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:30,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645939490] [2020-08-18 13:05:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:31,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:31,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:31,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:31,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:31,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:31,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:31,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:31,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:31,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:31,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:31,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:31,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:31,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:31,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:31,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:31,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 13:05:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 13:05:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 13:05:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 13:05:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 13:05:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 13:05:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 13:05:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 13:05:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 13:05:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 13:05:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5904 backedges. 82 proven. 2542 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2020-08-18 13:05:32,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645939490] [2020-08-18 13:05:32,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:32,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-18 13:05:32,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454425922] [2020-08-18 13:05:32,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-18 13:05:32,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:32,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-18 13:05:32,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2020-08-18 13:05:32,093 INFO L87 Difference]: Start difference. First operand 300 states and 300 transitions. Second operand 46 states. [2020-08-18 13:05:32,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:32,558 INFO L93 Difference]: Finished difference Result 310 states and 310 transitions. [2020-08-18 13:05:32,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-18 13:05:32,559 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 297 [2020-08-18 13:05:32,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:32,561 INFO L225 Difference]: With dead ends: 310 [2020-08-18 13:05:32,561 INFO L226 Difference]: Without dead ends: 308 [2020-08-18 13:05:32,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2020-08-18 13:05:32,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-08-18 13:05:32,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 307. [2020-08-18 13:05:32,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-08-18 13:05:32,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2020-08-18 13:05:32,572 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 297 [2020-08-18 13:05:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:32,573 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2020-08-18 13:05:32,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-18 13:05:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2020-08-18 13:05:32,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-08-18 13:05:32,575 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:32,575 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:32,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-18 13:05:32,576 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:32,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:32,576 INFO L82 PathProgramCache]: Analyzing trace with hash 56135637, now seen corresponding path program 42 times [2020-08-18 13:05:32,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:32,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338620883] [2020-08-18 13:05:32,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:33,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 13:05:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 13:05:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 13:05:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 13:05:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 13:05:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 13:05:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 13:05:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 13:05:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 13:05:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 13:05:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 13:05:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6195 backedges. 84 proven. 2667 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2020-08-18 13:05:33,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338620883] [2020-08-18 13:05:33,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:33,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-08-18 13:05:33,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398833909] [2020-08-18 13:05:33,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-08-18 13:05:33,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:33,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-08-18 13:05:33,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=1168, Unknown=0, NotChecked=0, Total=2162 [2020-08-18 13:05:33,816 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 47 states. [2020-08-18 13:05:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:34,249 INFO L93 Difference]: Finished difference Result 317 states and 317 transitions. [2020-08-18 13:05:34,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-08-18 13:05:34,250 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 304 [2020-08-18 13:05:34,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:34,252 INFO L225 Difference]: With dead ends: 317 [2020-08-18 13:05:34,252 INFO L226 Difference]: Without dead ends: 315 [2020-08-18 13:05:34,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=998, Invalid=1258, Unknown=0, NotChecked=0, Total=2256 [2020-08-18 13:05:34,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-08-18 13:05:34,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 314. [2020-08-18 13:05:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-08-18 13:05:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 314 transitions. [2020-08-18 13:05:34,262 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 314 transitions. Word has length 304 [2020-08-18 13:05:34,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:34,262 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 314 transitions. [2020-08-18 13:05:34,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-08-18 13:05:34,263 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 314 transitions. [2020-08-18 13:05:34,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-08-18 13:05:34,264 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:34,265 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:34,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-18 13:05:34,265 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:34,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:34,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1581966872, now seen corresponding path program 43 times [2020-08-18 13:05:34,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:34,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290561675] [2020-08-18 13:05:34,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:35,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 13:05:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 13:05:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 13:05:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 13:05:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 13:05:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 13:05:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 13:05:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 13:05:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 13:05:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 13:05:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 13:05:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 13:05:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6493 backedges. 86 proven. 2795 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2020-08-18 13:05:35,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290561675] [2020-08-18 13:05:35,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:35,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-18 13:05:35,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796158214] [2020-08-18 13:05:35,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-18 13:05:35,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:35,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-18 13:05:35,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2020-08-18 13:05:35,595 INFO L87 Difference]: Start difference. First operand 314 states and 314 transitions. Second operand 48 states. [2020-08-18 13:05:36,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:36,137 INFO L93 Difference]: Finished difference Result 324 states and 324 transitions. [2020-08-18 13:05:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-18 13:05:36,137 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 311 [2020-08-18 13:05:36,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:36,139 INFO L225 Difference]: With dead ends: 324 [2020-08-18 13:05:36,139 INFO L226 Difference]: Without dead ends: 322 [2020-08-18 13:05:36,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1043, Invalid=1309, Unknown=0, NotChecked=0, Total=2352 [2020-08-18 13:05:36,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-08-18 13:05:36,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 321. [2020-08-18 13:05:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-08-18 13:05:36,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 321 transitions. [2020-08-18 13:05:36,150 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 321 transitions. Word has length 311 [2020-08-18 13:05:36,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:36,151 INFO L479 AbstractCegarLoop]: Abstraction has 321 states and 321 transitions. [2020-08-18 13:05:36,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-18 13:05:36,151 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 321 transitions. [2020-08-18 13:05:36,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-18 13:05:36,168 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:36,168 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:36,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-18 13:05:36,168 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:36,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:36,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2076157045, now seen corresponding path program 44 times [2020-08-18 13:05:36,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:36,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872682137] [2020-08-18 13:05:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 13:05:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 13:05:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 13:05:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 13:05:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 13:05:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 13:05:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 13:05:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 13:05:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 13:05:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 13:05:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 13:05:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 13:05:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2020-08-18 13:05:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6798 backedges. 88 proven. 2926 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2020-08-18 13:05:37,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872682137] [2020-08-18 13:05:37,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:37,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-18 13:05:37,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477568106] [2020-08-18 13:05:37,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-18 13:05:37,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:37,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-18 13:05:37,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=1267, Unknown=0, NotChecked=0, Total=2352 [2020-08-18 13:05:37,501 INFO L87 Difference]: Start difference. First operand 321 states and 321 transitions. Second operand 49 states. [2020-08-18 13:05:37,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:37,995 INFO L93 Difference]: Finished difference Result 331 states and 331 transitions. [2020-08-18 13:05:37,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-08-18 13:05:37,995 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 318 [2020-08-18 13:05:37,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:37,998 INFO L225 Difference]: With dead ends: 331 [2020-08-18 13:05:37,998 INFO L226 Difference]: Without dead ends: 329 [2020-08-18 13:05:37,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1089, Invalid=1361, Unknown=0, NotChecked=0, Total=2450 [2020-08-18 13:05:38,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-08-18 13:05:38,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 328. [2020-08-18 13:05:38,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-18 13:05:38,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2020-08-18 13:05:38,008 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 318 [2020-08-18 13:05:38,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:38,008 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2020-08-18 13:05:38,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-18 13:05:38,009 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2020-08-18 13:05:38,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-08-18 13:05:38,011 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:38,011 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:38,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-18 13:05:38,011 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:38,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:38,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1146384056, now seen corresponding path program 45 times [2020-08-18 13:05:38,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:38,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663401821] [2020-08-18 13:05:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 13:05:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 13:05:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 13:05:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 13:05:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 13:05:39,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 13:05:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 13:05:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 13:05:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 13:05:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 13:05:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 13:05:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 13:05:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2020-08-18 13:05:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-18 13:05:39,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7110 backedges. 90 proven. 3060 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2020-08-18 13:05:39,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663401821] [2020-08-18 13:05:39,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:39,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-08-18 13:05:39,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245519664] [2020-08-18 13:05:39,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-18 13:05:39,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:39,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-18 13:05:39,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2020-08-18 13:05:39,379 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 50 states. [2020-08-18 13:05:39,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:39,908 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2020-08-18 13:05:39,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-08-18 13:05:39,908 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 325 [2020-08-18 13:05:39,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:39,910 INFO L225 Difference]: With dead ends: 338 [2020-08-18 13:05:39,910 INFO L226 Difference]: Without dead ends: 336 [2020-08-18 13:05:39,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2020-08-18 13:05:39,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-08-18 13:05:39,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 335. [2020-08-18 13:05:39,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-08-18 13:05:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 335 transitions. [2020-08-18 13:05:39,920 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 335 transitions. Word has length 325 [2020-08-18 13:05:39,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:39,920 INFO L479 AbstractCegarLoop]: Abstraction has 335 states and 335 transitions. [2020-08-18 13:05:39,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-18 13:05:39,921 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 335 transitions. [2020-08-18 13:05:39,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-08-18 13:05:39,923 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:39,923 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:39,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-18 13:05:39,924 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:39,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:39,924 INFO L82 PathProgramCache]: Analyzing trace with hash 22421781, now seen corresponding path program 46 times [2020-08-18 13:05:39,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:39,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545056665] [2020-08-18 13:05:39,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 13:05:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 13:05:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 13:05:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 13:05:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 13:05:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 13:05:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 13:05:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 13:05:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 13:05:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 13:05:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 13:05:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 13:05:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2020-08-18 13:05:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-18 13:05:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 321 [2020-08-18 13:05:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7429 backedges. 92 proven. 3197 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2020-08-18 13:05:41,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545056665] [2020-08-18 13:05:41,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:41,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-08-18 13:05:41,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339540988] [2020-08-18 13:05:41,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-08-18 13:05:41,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:41,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-08-18 13:05:41,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2020-08-18 13:05:41,385 INFO L87 Difference]: Start difference. First operand 335 states and 335 transitions. Second operand 51 states. [2020-08-18 13:05:42,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:42,021 INFO L93 Difference]: Finished difference Result 345 states and 345 transitions. [2020-08-18 13:05:42,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-08-18 13:05:42,022 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 332 [2020-08-18 13:05:42,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:42,024 INFO L225 Difference]: With dead ends: 345 [2020-08-18 13:05:42,024 INFO L226 Difference]: Without dead ends: 343 [2020-08-18 13:05:42,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2020-08-18 13:05:42,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-08-18 13:05:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 342. [2020-08-18 13:05:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-08-18 13:05:42,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 342 transitions. [2020-08-18 13:05:42,036 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 342 transitions. Word has length 332 [2020-08-18 13:05:42,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:42,036 INFO L479 AbstractCegarLoop]: Abstraction has 342 states and 342 transitions. [2020-08-18 13:05:42,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-08-18 13:05:42,036 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 342 transitions. [2020-08-18 13:05:42,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-08-18 13:05:42,038 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:42,039 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:42,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-18 13:05:42,039 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:42,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:42,040 INFO L82 PathProgramCache]: Analyzing trace with hash -540172120, now seen corresponding path program 47 times [2020-08-18 13:05:42,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:42,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593792114] [2020-08-18 13:05:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:43,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:43,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:43,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 13:05:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 13:05:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 13:05:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 13:05:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 13:05:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 13:05:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 13:05:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 13:05:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 13:05:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 13:05:43,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 13:05:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 13:05:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2020-08-18 13:05:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-18 13:05:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 321 [2020-08-18 13:05:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-08-18 13:05:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7755 backedges. 94 proven. 3337 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2020-08-18 13:05:43,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593792114] [2020-08-18 13:05:43,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:43,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-08-18 13:05:43,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530086262] [2020-08-18 13:05:43,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-08-18 13:05:43,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:43,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-08-18 13:05:43,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=1423, Unknown=0, NotChecked=0, Total=2652 [2020-08-18 13:05:43,610 INFO L87 Difference]: Start difference. First operand 342 states and 342 transitions. Second operand 52 states. [2020-08-18 13:05:44,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:44,304 INFO L93 Difference]: Finished difference Result 352 states and 352 transitions. [2020-08-18 13:05:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-08-18 13:05:44,304 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 339 [2020-08-18 13:05:44,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:44,306 INFO L225 Difference]: With dead ends: 352 [2020-08-18 13:05:44,307 INFO L226 Difference]: Without dead ends: 350 [2020-08-18 13:05:44,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1233, Invalid=1523, Unknown=0, NotChecked=0, Total=2756 [2020-08-18 13:05:44,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-08-18 13:05:44,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 349. [2020-08-18 13:05:44,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-08-18 13:05:44,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 349 transitions. [2020-08-18 13:05:44,317 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 349 transitions. Word has length 339 [2020-08-18 13:05:44,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:44,317 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 349 transitions. [2020-08-18 13:05:44,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-08-18 13:05:44,317 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 349 transitions. [2020-08-18 13:05:44,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-08-18 13:05:44,319 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:44,320 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:44,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-18 13:05:44,320 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:44,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:44,321 INFO L82 PathProgramCache]: Analyzing trace with hash 2030437813, now seen corresponding path program 48 times [2020-08-18 13:05:44,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:44,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387138456] [2020-08-18 13:05:44,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 13:05:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 13:05:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 13:05:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 13:05:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 13:05:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 13:05:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 13:05:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 13:05:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 13:05:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 13:05:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 13:05:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 13:05:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2020-08-18 13:05:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-18 13:05:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 321 [2020-08-18 13:05:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-08-18 13:05:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 335 [2020-08-18 13:05:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8088 backedges. 96 proven. 3480 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2020-08-18 13:05:45,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387138456] [2020-08-18 13:05:45,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:45,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-08-18 13:05:45,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753275746] [2020-08-18 13:05:45,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-18 13:05:45,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:45,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-18 13:05:45,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2020-08-18 13:05:45,867 INFO L87 Difference]: Start difference. First operand 349 states and 349 transitions. Second operand 53 states. [2020-08-18 13:05:46,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:46,520 INFO L93 Difference]: Finished difference Result 359 states and 359 transitions. [2020-08-18 13:05:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-08-18 13:05:46,521 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 346 [2020-08-18 13:05:46,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:46,523 INFO L225 Difference]: With dead ends: 359 [2020-08-18 13:05:46,523 INFO L226 Difference]: Without dead ends: 357 [2020-08-18 13:05:46,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1283, Invalid=1579, Unknown=0, NotChecked=0, Total=2862 [2020-08-18 13:05:46,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-18 13:05:46,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 356. [2020-08-18 13:05:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-08-18 13:05:46,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 356 transitions. [2020-08-18 13:05:46,532 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 356 transitions. Word has length 346 [2020-08-18 13:05:46,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:46,533 INFO L479 AbstractCegarLoop]: Abstraction has 356 states and 356 transitions. [2020-08-18 13:05:46,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-18 13:05:46,533 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 356 transitions. [2020-08-18 13:05:46,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-08-18 13:05:46,535 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:46,535 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:46,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-18 13:05:46,536 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:46,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:46,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1376696312, now seen corresponding path program 49 times [2020-08-18 13:05:46,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:46,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119322730] [2020-08-18 13:05:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:48,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:48,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:48,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 13:05:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 13:05:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 13:05:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 13:05:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 13:05:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 13:05:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 13:05:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 13:05:48,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 13:05:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 13:05:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 13:05:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 13:05:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2020-08-18 13:05:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-18 13:05:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 321 [2020-08-18 13:05:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-08-18 13:05:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 335 [2020-08-18 13:05:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-08-18 13:05:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8428 backedges. 98 proven. 3626 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2020-08-18 13:05:48,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119322730] [2020-08-18 13:05:48,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:48,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-08-18 13:05:48,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899955629] [2020-08-18 13:05:48,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-08-18 13:05:48,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:48,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-08-18 13:05:48,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2020-08-18 13:05:48,167 INFO L87 Difference]: Start difference. First operand 356 states and 356 transitions. Second operand 54 states. [2020-08-18 13:05:48,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:48,863 INFO L93 Difference]: Finished difference Result 366 states and 366 transitions. [2020-08-18 13:05:48,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-18 13:05:48,864 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 353 [2020-08-18 13:05:48,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:48,867 INFO L225 Difference]: With dead ends: 366 [2020-08-18 13:05:48,867 INFO L226 Difference]: Without dead ends: 364 [2020-08-18 13:05:48,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1334, Invalid=1636, Unknown=0, NotChecked=0, Total=2970 [2020-08-18 13:05:48,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-08-18 13:05:48,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 363. [2020-08-18 13:05:48,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-08-18 13:05:48,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 363 transitions. [2020-08-18 13:05:48,877 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 363 transitions. Word has length 353 [2020-08-18 13:05:48,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:48,878 INFO L479 AbstractCegarLoop]: Abstraction has 363 states and 363 transitions. [2020-08-18 13:05:48,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-08-18 13:05:48,878 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 363 transitions. [2020-08-18 13:05:48,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-08-18 13:05:48,879 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:48,880 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:48,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-18 13:05:48,880 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:48,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:48,880 INFO L82 PathProgramCache]: Analyzing trace with hash -432450987, now seen corresponding path program 50 times [2020-08-18 13:05:48,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:48,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376871111] [2020-08-18 13:05:48,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:48,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:50,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 13:05:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 13:05:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 13:05:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 13:05:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 13:05:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 13:05:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 13:05:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 13:05:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 13:05:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 13:05:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 13:05:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 13:05:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2020-08-18 13:05:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-18 13:05:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 321 [2020-08-18 13:05:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-08-18 13:05:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 335 [2020-08-18 13:05:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-08-18 13:05:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 349 [2020-08-18 13:05:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8775 backedges. 100 proven. 3775 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2020-08-18 13:05:50,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376871111] [2020-08-18 13:05:50,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:50,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-08-18 13:05:50,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630260282] [2020-08-18 13:05:50,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-18 13:05:50,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:50,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-18 13:05:50,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1382, Invalid=1588, Unknown=0, NotChecked=0, Total=2970 [2020-08-18 13:05:50,559 INFO L87 Difference]: Start difference. First operand 363 states and 363 transitions. Second operand 55 states. [2020-08-18 13:05:51,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:05:51,282 INFO L93 Difference]: Finished difference Result 373 states and 373 transitions. [2020-08-18 13:05:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-08-18 13:05:51,283 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 360 [2020-08-18 13:05:51,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:05:51,285 INFO L225 Difference]: With dead ends: 373 [2020-08-18 13:05:51,285 INFO L226 Difference]: Without dead ends: 371 [2020-08-18 13:05:51,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1386, Invalid=1694, Unknown=0, NotChecked=0, Total=3080 [2020-08-18 13:05:51,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-08-18 13:05:51,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 370. [2020-08-18 13:05:51,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-08-18 13:05:51,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 370 transitions. [2020-08-18 13:05:51,294 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 370 transitions. Word has length 360 [2020-08-18 13:05:51,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:05:51,294 INFO L479 AbstractCegarLoop]: Abstraction has 370 states and 370 transitions. [2020-08-18 13:05:51,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-18 13:05:51,295 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 370 transitions. [2020-08-18 13:05:51,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-08-18 13:05:51,297 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:05:51,298 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:05:51,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-18 13:05:51,298 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:05:51,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:05:51,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1466730344, now seen corresponding path program 51 times [2020-08-18 13:05:51,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:05:51,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596042076] [2020-08-18 13:05:51,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:05:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:05:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 13:05:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 13:05:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 13:05:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 13:05:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 13:05:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 13:05:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 13:05:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 13:05:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 13:05:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 13:05:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 13:05:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 13:05:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 13:05:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 13:05:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 13:05:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 13:05:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:05:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 13:05:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 13:05:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 13:05:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 13:05:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 13:05:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 13:05:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 13:05:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 13:05:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 13:05:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-18 13:05:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 13:05:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 13:05:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 13:05:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-18 13:05:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 13:05:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 13:05:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 13:05:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-18 13:05:52,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 13:05:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-18 13:05:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 13:05:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:52,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-18 13:05:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:53,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-08-18 13:05:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:53,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-18 13:05:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:53,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 13:05:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:53,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 13:05:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:53,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2020-08-18 13:05:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:53,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-18 13:05:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:53,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 321 [2020-08-18 13:05:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:53,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-08-18 13:05:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:53,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 335 [2020-08-18 13:05:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:53,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-08-18 13:05:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:53,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 349 [2020-08-18 13:05:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:53,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2020-08-18 13:05:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:05:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9129 backedges. 102 proven. 3927 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2020-08-18 13:05:53,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596042076] [2020-08-18 13:05:53,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:05:53,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-08-18 13:05:53,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057899675] [2020-08-18 13:05:53,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-08-18 13:05:53,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:05:53,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-08-18 13:05:53,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=1645, Unknown=0, NotChecked=0, Total=3080 [2020-08-18 13:05:53,080 INFO L87 Difference]: Start difference. First operand 370 states and 370 transitions. Second operand 56 states.