/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 23:31:28,690 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 23:31:28,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 23:31:28,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 23:31:28,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 23:31:28,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 23:31:28,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 23:31:28,774 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 23:31:28,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 23:31:28,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 23:31:28,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 23:31:28,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 23:31:28,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 23:31:28,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 23:31:28,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 23:31:28,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:31:28,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:31:28,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:31:28,807 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 23:31:28,852 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:31:28,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:31:28,855 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:31:28,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:31:28,856 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:31:28,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:31:28,856 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:31:28,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:31:28,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:31:28,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:31:28,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:31:28,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:31:28,859 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:31:28,859 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:31:28,859 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:31:28,859 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:31:28,860 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:31:28,860 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:31:28,860 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:31:28,860 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:31:28,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:31:28,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:31:28,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:31:28,861 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:31:28,861 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:31:28,861 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:31:28,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:31:28,862 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:31:28,862 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:31:28,862 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=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:31:29,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:31:29,152 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:31:29,155 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:31:29,157 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:31:29,158 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:31:29,158 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o20.c [2020-08-18 23:31:29,245 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5cf0c0f41/c7b3a4a649df4b3a8b2009e174dcb559/FLAG01bfe47a2 [2020-08-18 23:31:29,708 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:31:29,708 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o20.c [2020-08-18 23:31:29,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5cf0c0f41/c7b3a4a649df4b3a8b2009e174dcb559/FLAG01bfe47a2 [2020-08-18 23:31:30,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5cf0c0f41/c7b3a4a649df4b3a8b2009e174dcb559 [2020-08-18 23:31:30,095 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:31:30,096 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:31:30,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:31:30,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:31:30,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:31:30,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:31:30" (1/1) ... [2020-08-18 23:31:30,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c6c8a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:30, skipping insertion in model container [2020-08-18 23:31:30,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:31:30" (1/1) ... [2020-08-18 23:31:30,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:31:30,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:31:30,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:31:30,313 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:31:30,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:31:30,339 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:31:30,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:30 WrapperNode [2020-08-18 23:31:30,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:31:30,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:31:30,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:31:30,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:31:30,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:30" (1/1) ... [2020-08-18 23:31:30,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:30" (1/1) ... [2020-08-18 23:31:30,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:30" (1/1) ... [2020-08-18 23:31:30,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:30" (1/1) ... [2020-08-18 23:31:30,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:30" (1/1) ... [2020-08-18 23:31:30,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:30" (1/1) ... [2020-08-18 23:31:30,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:30" (1/1) ... [2020-08-18 23:31:30,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:31:30,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:31:30,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:31:30,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:31:30,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:30" (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 23:31:30,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:31:30,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:31:30,511 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-18 23:31:30,511 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:31:30,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 23:31:30,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:31:30,511 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-18 23:31:30,512 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:31:30,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:31:30,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:31:30,682 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:31:30,682 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 23:31:30,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:31:30 BoogieIcfgContainer [2020-08-18 23:31:30,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:31:30,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:31:30,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:31:30,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:31:30,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:31:30" (1/3) ... [2020-08-18 23:31:30,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44920367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:31:30, skipping insertion in model container [2020-08-18 23:31:30,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:30" (2/3) ... [2020-08-18 23:31:30,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44920367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:31:30, skipping insertion in model container [2020-08-18 23:31:30,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:31:30" (3/3) ... [2020-08-18 23:31:30,695 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o20.c [2020-08-18 23:31:30,705 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:31:30,711 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 23:31:30,726 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 23:31:30,762 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:31:30,762 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:31:30,763 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:31:30,764 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:31:30,764 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:31:30,764 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:31:30,764 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:31:30,764 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:31:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 23:31:30,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 23:31:30,787 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:30,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:30,788 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:30,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:30,794 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-18 23:31:30,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:30,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351837827] [2020-08-18 23:31:30,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:30,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:31,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:31,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:31,169 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 23:31:31,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351837827] [2020-08-18 23:31:31,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:31:31,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 23:31:31,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171343837] [2020-08-18 23:31:31,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 23:31:31,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:31,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 23:31:31,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:31:31,199 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-18 23:31:31,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:31,251 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-18 23:31:31,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 23:31:31,253 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 23:31:31,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:31,264 INFO L225 Difference]: With dead ends: 32 [2020-08-18 23:31:31,265 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 23:31:31,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:31:31,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 23:31:31,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 23:31:31,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 23:31:31,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 23:31:31,311 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-18 23:31:31,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:31,312 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 23:31:31,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 23:31:31,312 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 23:31:31,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 23:31:31,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:31,314 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:31,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:31:31,315 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:31,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:31,315 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-18 23:31:31,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:31,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231263603] [2020-08-18 23:31:31,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:31,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:31,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:31,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 23:31:31,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231263603] [2020-08-18 23:31:31,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:31,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 23:31:31,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677917346] [2020-08-18 23:31:31,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 23:31:31,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:31,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 23:31:31,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 23:31:31,538 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-08-18 23:31:31,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:31,575 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-18 23:31:31,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 23:31:31,576 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-18 23:31:31,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:31,577 INFO L225 Difference]: With dead ends: 25 [2020-08-18 23:31:31,578 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 23:31:31,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 23:31:31,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 23:31:31,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 23:31:31,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 23:31:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 23:31:31,587 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-18 23:31:31,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:31,587 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 23:31:31,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 23:31:31,588 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 23:31:31,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 23:31:31,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:31,589 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:31,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:31:31,590 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:31,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:31,591 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-18 23:31:31,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:31,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677522936] [2020-08-18 23:31:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:31,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:31,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:31,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:31,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 23:31:31,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677522936] [2020-08-18 23:31:31,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:31,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 23:31:31,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318706722] [2020-08-18 23:31:31,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 23:31:31,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:31,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 23:31:31,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 23:31:31,862 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-08-18 23:31:31,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:31,908 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-18 23:31:31,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 23:31:31,909 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-08-18 23:31:31,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:31,910 INFO L225 Difference]: With dead ends: 28 [2020-08-18 23:31:31,911 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 23:31:31,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 23:31:31,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 23:31:31,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-18 23:31:31,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 23:31:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-18 23:31:31,918 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-18 23:31:31,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:31,919 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-18 23:31:31,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 23:31:31,919 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-18 23:31:31,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 23:31:31,920 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:31,921 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:31,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 23:31:31,922 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:31,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:31,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-18 23:31:31,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:31,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015665069] [2020-08-18 23:31:31,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:32,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:32,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:32,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:32,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:32,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 23:31:32,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015665069] [2020-08-18 23:31:32,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:32,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 23:31:32,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92866290] [2020-08-18 23:31:32,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 23:31:32,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:32,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 23:31:32,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 23:31:32,310 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-08-18 23:31:32,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:32,383 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-18 23:31:32,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 23:31:32,384 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-08-18 23:31:32,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:32,385 INFO L225 Difference]: With dead ends: 31 [2020-08-18 23:31:32,385 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 23:31:32,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 23:31:32,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 23:31:32,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-18 23:31:32,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 23:31:32,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-18 23:31:32,398 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-18 23:31:32,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:32,399 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-18 23:31:32,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 23:31:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-18 23:31:32,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 23:31:32,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:32,402 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:32,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 23:31:32,402 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:32,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:32,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-18 23:31:32,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:32,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164691804] [2020-08-18 23:31:32,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:32,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:32,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:32,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:32,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:32,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:32,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-18 23:31:32,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164691804] [2020-08-18 23:31:32,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:32,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 23:31:32,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656059766] [2020-08-18 23:31:32,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 23:31:32,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:32,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 23:31:32,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-18 23:31:32,675 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-08-18 23:31:32,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:32,753 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-18 23:31:32,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 23:31:32,754 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-08-18 23:31:32,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:32,756 INFO L225 Difference]: With dead ends: 34 [2020-08-18 23:31:32,756 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 23:31:32,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-18 23:31:32,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 23:31:32,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 23:31:32,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 23:31:32,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-18 23:31:32,763 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-18 23:31:32,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:32,764 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-18 23:31:32,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 23:31:32,764 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-18 23:31:32,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 23:31:32,765 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:32,766 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:32,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 23:31:32,766 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:32,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:32,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-18 23:31:32,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:32,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071166592] [2020-08-18 23:31:32,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:32,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:32,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:32,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:32,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:32,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:33,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:33,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-18 23:31:33,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071166592] [2020-08-18 23:31:33,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:33,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 23:31:33,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353980051] [2020-08-18 23:31:33,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 23:31:33,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:33,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 23:31:33,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-18 23:31:33,098 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2020-08-18 23:31:33,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:33,189 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-18 23:31:33,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 23:31:33,189 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-08-18 23:31:33,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:33,191 INFO L225 Difference]: With dead ends: 37 [2020-08-18 23:31:33,191 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 23:31:33,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-18 23:31:33,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 23:31:33,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-18 23:31:33,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 23:31:33,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-18 23:31:33,198 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-18 23:31:33,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:33,199 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-18 23:31:33,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 23:31:33,199 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-18 23:31:33,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 23:31:33,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:33,200 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:33,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 23:31:33,201 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:33,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:33,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-18 23:31:33,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:33,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917220849] [2020-08-18 23:31:33,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:33,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:33,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:33,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:33,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:33,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:33,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:33,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:33,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-18 23:31:33,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917220849] [2020-08-18 23:31:33,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:33,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 23:31:33,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251207578] [2020-08-18 23:31:33,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 23:31:33,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:33,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 23:31:33,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-18 23:31:33,555 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2020-08-18 23:31:33,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:33,676 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-18 23:31:33,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 23:31:33,677 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-08-18 23:31:33,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:33,678 INFO L225 Difference]: With dead ends: 40 [2020-08-18 23:31:33,679 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 23:31:33,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-18 23:31:33,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 23:31:33,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-18 23:31:33,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 23:31:33,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-18 23:31:33,686 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-18 23:31:33,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:33,686 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-18 23:31:33,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 23:31:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-18 23:31:33,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 23:31:33,688 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:33,688 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:33,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 23:31:33,689 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:33,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:33,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-18 23:31:33,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:33,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428075293] [2020-08-18 23:31:33,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:33,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:33,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:33,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:33,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:33,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:33,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:33,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:34,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:34,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-18 23:31:34,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428075293] [2020-08-18 23:31:34,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:34,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 23:31:34,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313863723] [2020-08-18 23:31:34,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 23:31:34,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:34,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 23:31:34,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-18 23:31:34,127 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 19 states. [2020-08-18 23:31:34,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:34,270 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-18 23:31:34,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 23:31:34,271 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-08-18 23:31:34,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:34,272 INFO L225 Difference]: With dead ends: 43 [2020-08-18 23:31:34,272 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 23:31:34,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-18 23:31:34,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 23:31:34,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-18 23:31:34,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 23:31:34,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-18 23:31:34,280 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-18 23:31:34,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:34,280 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-18 23:31:34,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 23:31:34,280 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-18 23:31:34,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 23:31:34,281 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:34,282 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:34,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 23:31:34,282 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:34,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:34,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-18 23:31:34,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:34,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718155734] [2020-08-18 23:31:34,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:34,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:34,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:34,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:34,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:34,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:34,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:34,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:34,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:34,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:34,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:34,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-18 23:31:34,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718155734] [2020-08-18 23:31:34,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:34,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 23:31:34,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282084410] [2020-08-18 23:31:34,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 23:31:34,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:34,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 23:31:34,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-18 23:31:34,879 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 21 states. [2020-08-18 23:31:35,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:35,042 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-18 23:31:35,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 23:31:35,043 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-08-18 23:31:35,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:35,045 INFO L225 Difference]: With dead ends: 46 [2020-08-18 23:31:35,045 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 23:31:35,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-18 23:31:35,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 23:31:35,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-18 23:31:35,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 23:31:35,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-18 23:31:35,052 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-18 23:31:35,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:35,053 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-18 23:31:35,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 23:31:35,053 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-18 23:31:35,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 23:31:35,054 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:35,055 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:35,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 23:31:35,055 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:35,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:35,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-18 23:31:35,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:35,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83182695] [2020-08-18 23:31:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:35,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:35,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:35,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:35,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:35,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:35,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:35,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:35,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:35,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:35,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:35,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-18 23:31:35,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83182695] [2020-08-18 23:31:35,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:35,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 23:31:35,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74919633] [2020-08-18 23:31:35,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 23:31:35,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:35,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 23:31:35,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-18 23:31:35,632 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2020-08-18 23:31:35,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:35,852 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-18 23:31:35,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 23:31:35,853 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-08-18 23:31:35,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:35,854 INFO L225 Difference]: With dead ends: 49 [2020-08-18 23:31:35,854 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 23:31:35,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-18 23:31:35,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 23:31:35,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-18 23:31:35,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 23:31:35,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-18 23:31:35,861 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-18 23:31:35,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:35,862 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-18 23:31:35,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 23:31:35,862 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-18 23:31:35,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 23:31:35,863 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:35,863 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:35,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 23:31:35,864 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:35,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:35,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-18 23:31:35,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:35,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201884634] [2020-08-18 23:31:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:35,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:35,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:36,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:36,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:36,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:36,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:36,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:36,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:36,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:36,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:36,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:36,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-18 23:31:36,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201884634] [2020-08-18 23:31:36,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:36,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 23:31:36,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904982679] [2020-08-18 23:31:36,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 23:31:36,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:36,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 23:31:36,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-18 23:31:36,584 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 25 states. [2020-08-18 23:31:36,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:36,837 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-18 23:31:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 23:31:36,838 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-18 23:31:36,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:36,839 INFO L225 Difference]: With dead ends: 52 [2020-08-18 23:31:36,839 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 23:31:36,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-18 23:31:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 23:31:36,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-18 23:31:36,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 23:31:36,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-18 23:31:36,847 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-18 23:31:36,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:36,847 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-18 23:31:36,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 23:31:36,847 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-18 23:31:36,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 23:31:36,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:36,849 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:36,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 23:31:36,849 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:36,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:36,850 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-18 23:31:36,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:36,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292190203] [2020-08-18 23:31:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:36,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:36,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:36,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:37,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:37,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:37,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:37,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:37,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:37,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:37,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:37,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:37,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:37,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-18 23:31:37,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292190203] [2020-08-18 23:31:37,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:37,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 23:31:37,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131861548] [2020-08-18 23:31:37,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 23:31:37,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:37,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 23:31:37,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-08-18 23:31:37,710 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 27 states. [2020-08-18 23:31:38,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:38,086 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-18 23:31:38,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 23:31:38,086 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2020-08-18 23:31:38,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:38,088 INFO L225 Difference]: With dead ends: 55 [2020-08-18 23:31:38,088 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 23:31:38,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-08-18 23:31:38,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 23:31:38,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-18 23:31:38,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-18 23:31:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-18 23:31:38,095 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-18 23:31:38,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:38,095 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-18 23:31:38,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 23:31:38,096 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-18 23:31:38,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 23:31:38,097 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:38,097 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:38,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 23:31:38,097 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:38,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:38,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-18 23:31:38,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:38,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577532012] [2020-08-18 23:31:38,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:38,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:38,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:38,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:38,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:38,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:38,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:38,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:38,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:38,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:38,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:38,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:38,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:39,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:39,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-18 23:31:39,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577532012] [2020-08-18 23:31:39,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:39,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-18 23:31:39,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033731865] [2020-08-18 23:31:39,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-18 23:31:39,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:39,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-18 23:31:39,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-18 23:31:39,159 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 29 states. [2020-08-18 23:31:39,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:39,582 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-18 23:31:39,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-18 23:31:39,583 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2020-08-18 23:31:39,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:39,584 INFO L225 Difference]: With dead ends: 58 [2020-08-18 23:31:39,584 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 23:31:39,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-18 23:31:39,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 23:31:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-18 23:31:39,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 23:31:39,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-18 23:31:39,598 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-18 23:31:39,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:39,599 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-18 23:31:39,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-18 23:31:39,600 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-18 23:31:39,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 23:31:39,603 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:39,604 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:39,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 23:31:39,604 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:39,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:39,606 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-18 23:31:39,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:39,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920688993] [2020-08-18 23:31:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:39,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:39,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:39,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:39,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:40,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:40,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:40,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:40,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:40,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:40,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:40,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:40,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:40,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:40,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:40,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-18 23:31:40,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920688993] [2020-08-18 23:31:40,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:40,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-18 23:31:40,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183292553] [2020-08-18 23:31:40,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-18 23:31:40,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:40,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-18 23:31:40,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-08-18 23:31:40,847 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 31 states. [2020-08-18 23:31:41,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:41,338 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-18 23:31:41,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-18 23:31:41,338 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2020-08-18 23:31:41,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:41,340 INFO L225 Difference]: With dead ends: 61 [2020-08-18 23:31:41,340 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 23:31:41,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-08-18 23:31:41,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 23:31:41,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-18 23:31:41,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 23:31:41,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-18 23:31:41,352 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-18 23:31:41,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:41,353 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-18 23:31:41,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-18 23:31:41,353 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-18 23:31:41,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 23:31:41,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:41,356 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:41,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 23:31:41,358 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:41,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:41,358 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-18 23:31:41,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:41,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835158408] [2020-08-18 23:31:41,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:41,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:41,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:41,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:41,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:41,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:41,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:41,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:41,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:41,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:41,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:42,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:42,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:42,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:42,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:42,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:42,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-18 23:31:42,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835158408] [2020-08-18 23:31:42,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:42,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-18 23:31:42,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166559761] [2020-08-18 23:31:42,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-18 23:31:42,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:42,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-18 23:31:42,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 23:31:42,599 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 33 states. [2020-08-18 23:31:43,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:43,052 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-18 23:31:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-18 23:31:43,053 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 97 [2020-08-18 23:31:43,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:43,053 INFO L225 Difference]: With dead ends: 64 [2020-08-18 23:31:43,054 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 23:31:43,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 23:31:43,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 23:31:43,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-18 23:31:43,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-18 23:31:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-18 23:31:43,063 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-18 23:31:43,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:43,064 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-18 23:31:43,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-18 23:31:43,064 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-18 23:31:43,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-18 23:31:43,066 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:43,066 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:43,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 23:31:43,067 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:43,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:43,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-18 23:31:43,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:43,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26929706] [2020-08-18 23:31:43,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:43,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:43,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:43,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:43,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:43,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:43,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:43,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:43,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:43,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:43,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:43,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:43,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:43,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:43,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:43,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:43,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:44,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:44,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-18 23:31:44,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26929706] [2020-08-18 23:31:44,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:44,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-18 23:31:44,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522662080] [2020-08-18 23:31:44,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-18 23:31:44,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:44,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-18 23:31:44,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 23:31:44,247 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-08-18 23:31:44,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:44,780 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-18 23:31:44,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-18 23:31:44,780 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-08-18 23:31:44,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:44,782 INFO L225 Difference]: With dead ends: 67 [2020-08-18 23:31:44,782 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 23:31:44,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 23:31:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 23:31:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-18 23:31:44,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-18 23:31:44,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-18 23:31:44,792 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-18 23:31:44,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:44,794 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-18 23:31:44,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-18 23:31:44,794 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-18 23:31:44,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-18 23:31:44,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:44,796 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:44,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 23:31:44,801 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:44,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:44,801 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-18 23:31:44,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:44,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914249672] [2020-08-18 23:31:44,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:44,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:44,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:44,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:44,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:45,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:45,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:45,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:45,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:45,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:45,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:45,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:45,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:45,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:45,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:45,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:45,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:45,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:45,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-18 23:31:46,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914249672] [2020-08-18 23:31:46,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:46,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-18 23:31:46,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157604683] [2020-08-18 23:31:46,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-18 23:31:46,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:46,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-18 23:31:46,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 23:31:46,162 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 37 states. [2020-08-18 23:31:46,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:46,734 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-18 23:31:46,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-18 23:31:46,734 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2020-08-18 23:31:46,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:46,736 INFO L225 Difference]: With dead ends: 70 [2020-08-18 23:31:46,736 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 23:31:46,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 23:31:46,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 23:31:46,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-18 23:31:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-18 23:31:46,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-18 23:31:46,742 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-18 23:31:46,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:46,742 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-18 23:31:46,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-18 23:31:46,742 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-18 23:31:46,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-18 23:31:46,743 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:46,744 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:46,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 23:31:46,744 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:46,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:46,744 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-18 23:31:46,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:46,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704938890] [2020-08-18 23:31:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:46,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:46,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:46,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:46,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:46,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:47,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:47,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:47,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:47,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:47,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:47,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:47,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:47,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:47,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:47,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:47,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:47,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:48,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:48,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:48,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:48,388 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-18 23:31:48,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704938890] [2020-08-18 23:31:48,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:48,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-18 23:31:48,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99292953] [2020-08-18 23:31:48,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-18 23:31:48,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:48,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-18 23:31:48,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-08-18 23:31:48,390 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 39 states. [2020-08-18 23:31:49,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:49,073 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-18 23:31:49,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-18 23:31:49,073 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2020-08-18 23:31:49,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:49,074 INFO L225 Difference]: With dead ends: 73 [2020-08-18 23:31:49,074 INFO L226 Difference]: Without dead ends: 69 [2020-08-18 23:31:49,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-08-18 23:31:49,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-18 23:31:49,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-18 23:31:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 23:31:49,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-18 23:31:49,081 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-18 23:31:49,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:49,081 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-18 23:31:49,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-18 23:31:49,081 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-18 23:31:49,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 23:31:49,082 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:49,083 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:49,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 23:31:49,083 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:49,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:49,083 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-08-18 23:31:49,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:49,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79481709] [2020-08-18 23:31:49,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:49,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:49,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:49,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:49,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:49,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:49,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:49,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:49,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:49,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:49,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:49,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:49,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:49,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:50,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:50,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:50,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:50,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:50,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:50,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:50,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-18 23:31:50,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79481709] [2020-08-18 23:31:50,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:50,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-18 23:31:50,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778806714] [2020-08-18 23:31:50,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-18 23:31:50,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:50,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-18 23:31:50,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-18 23:31:50,838 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 41 states. [2020-08-18 23:31:51,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:51,625 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-18 23:31:51,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-18 23:31:51,626 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 121 [2020-08-18 23:31:51,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:51,627 INFO L225 Difference]: With dead ends: 76 [2020-08-18 23:31:51,628 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 23:31:51,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-18 23:31:51,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 23:31:51,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-18 23:31:51,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 23:31:51,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-18 23:31:51,638 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-18 23:31:51,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:51,641 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-18 23:31:51,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-18 23:31:51,642 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-18 23:31:51,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-18 23:31:51,643 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:51,643 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:51,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 23:31:51,644 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:51,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:51,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-08-18 23:31:51,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:51,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610430099] [2020-08-18 23:31:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:51,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:51,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:51,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:51,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:51,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:51,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:52,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:52,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:52,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:52,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:52,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:52,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:52,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:52,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:52,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:52,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:52,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:52,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:52,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:53,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:53,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:53,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-18 23:31:53,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610430099] [2020-08-18 23:31:53,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:53,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-18 23:31:53,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256967518] [2020-08-18 23:31:53,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-18 23:31:53,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:53,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-18 23:31:53,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-08-18 23:31:53,372 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 43 states. [2020-08-18 23:31:54,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:54,127 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-18 23:31:54,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-18 23:31:54,128 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2020-08-18 23:31:54,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:54,130 INFO L225 Difference]: With dead ends: 79 [2020-08-18 23:31:54,130 INFO L226 Difference]: Without dead ends: 75 [2020-08-18 23:31:54,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-08-18 23:31:54,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-18 23:31:54,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-18 23:31:54,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 23:31:54,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-18 23:31:54,139 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-18 23:31:54,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:54,139 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-18 23:31:54,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-18 23:31:54,139 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-18 23:31:54,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-18 23:31:54,142 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:54,143 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:54,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 23:31:54,143 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:54,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:54,143 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-08-18 23:31:54,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:54,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345764202] [2020-08-18 23:31:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 23:31:54,232 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 23:31:54,232 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 23:31:54,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 23:31:54,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:31:54 BoogieIcfgContainer [2020-08-18 23:31:54,266 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 23:31:54,269 INFO L168 Benchmark]: Toolchain (without parser) took 24172.05 ms. Allocated memory was 142.1 MB in the beginning and 492.3 MB in the end (delta: 350.2 MB). Free memory was 105.0 MB in the beginning and 287.6 MB in the end (delta: -182.6 MB). Peak memory consumption was 167.6 MB. Max. memory is 7.1 GB. [2020-08-18 23:31:54,270 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-18 23:31:54,270 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.36 ms. Allocated memory is still 142.1 MB. Free memory was 104.8 MB in the beginning and 95.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-18 23:31:54,271 INFO L168 Benchmark]: Boogie Preprocessor took 24.44 ms. Allocated memory is still 142.1 MB. Free memory was 95.5 MB in the beginning and 94.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-18 23:31:54,272 INFO L168 Benchmark]: RCFGBuilder took 320.63 ms. Allocated memory was 142.1 MB in the beginning and 205.5 MB in the end (delta: 63.4 MB). Free memory was 94.2 MB in the beginning and 174.9 MB in the end (delta: -80.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-18 23:31:54,272 INFO L168 Benchmark]: TraceAbstraction took 23578.93 ms. Allocated memory was 205.5 MB in the beginning and 492.3 MB in the end (delta: 286.8 MB). Free memory was 174.3 MB in the beginning and 287.6 MB in the end (delta: -113.3 MB). Peak memory consumption was 173.5 MB. Max. memory is 7.1 GB. [2020-08-18 23:31:54,275 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 243.36 ms. Allocated memory is still 142.1 MB. Free memory was 104.8 MB in the beginning and 95.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.44 ms. Allocated memory is still 142.1 MB. Free memory was 95.5 MB in the beginning and 94.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 320.63 ms. Allocated memory was 142.1 MB in the beginning and 205.5 MB in the end (delta: 63.4 MB). Free memory was 94.2 MB in the beginning and 174.9 MB in the end (delta: -80.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23578.93 ms. Allocated memory was 205.5 MB in the beginning and 492.3 MB in the end (delta: 286.8 MB). Free memory was 174.3 MB in the beginning and 287.6 MB in the end (delta: -113.3 MB). Peak memory consumption was 173.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] unsigned int result = id(input); [L12] COND TRUE result == 20 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23.4s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 6.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 684 SDtfs, 2 SDslu, 14532 SDs, 0 SdLazy, 8656 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 940 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 440 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 15.9s InterpolantComputationTime, 1533 NumberOfCodeBlocks, 1533 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1380 ConstructedInterpolants, 0 QuantifiedInterpolants, 465600 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 1 PerfectInterpolantSequences, 3800/7600 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...