/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=0.6 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 01:08:27,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 01:08:27,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 01:08:27,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-19 01:08:27,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:08:27,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:08:27,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:08:27,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:08:27,756 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:08:27,757 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:08:27,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:08:27,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:08:27,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:08:27,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:08:27,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:08:27,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:08:27,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 01:08:27,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:08:27,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:08:27,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:08:27,793 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 01:08:27,847 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:08:27,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:08:27,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:08:27,854 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:08:27,854 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:08:27,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:08:27,855 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:08:27,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:08:27,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:08:27,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:08:27,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:08:27,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:08:27,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:08:27,856 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:08:27,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:08:27,856 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:08:27,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:08:27,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:08:27,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:08:27,858 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:08:27,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:08:27,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:08:27,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:08:27,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:08:27,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:08:27,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:08:27,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:08:27,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:08:27,860 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:08:27,860 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=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; [2020-08-19 01:08:28,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:08:28,195 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:08:28,205 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:08:28,207 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:08:28,207 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:08:28,209 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-2.c [2020-08-19 01:08:28,270 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/123caa3d5/43ebd6c95ea34b9c8f4117eb3ca81bd3/FLAG914d22dbe [2020-08-19 01:08:28,713 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:08:28,714 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i15_o15-2.c [2020-08-19 01:08:28,721 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/123caa3d5/43ebd6c95ea34b9c8f4117eb3ca81bd3/FLAG914d22dbe [2020-08-19 01:08:29,148 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/123caa3d5/43ebd6c95ea34b9c8f4117eb3ca81bd3 [2020-08-19 01:08:29,158 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:08:29,160 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:08:29,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:08:29,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:08:29,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:08:29,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:08:29" (1/1) ... [2020-08-19 01:08:29,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3502e6e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:29, skipping insertion in model container [2020-08-19 01:08:29,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:08:29" (1/1) ... [2020-08-19 01:08:29,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:08:29,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:08:29,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:08:29,350 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:08:29,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:08:29,373 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:08:29,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:29 WrapperNode [2020-08-19 01:08:29,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:08:29,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:08:29,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:08:29,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:08:29,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:29" (1/1) ... [2020-08-19 01:08:29,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:29" (1/1) ... [2020-08-19 01:08:29,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:29" (1/1) ... [2020-08-19 01:08:29,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:29" (1/1) ... [2020-08-19 01:08:29,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:29" (1/1) ... [2020-08-19 01:08:29,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:29" (1/1) ... [2020-08-19 01:08:29,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:29" (1/1) ... [2020-08-19 01:08:29,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:08:29,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:08:29,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:08:29,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:08:29,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:08:29,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:08:29,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:08:29,551 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-19 01:08:29,551 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:08:29,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 01:08:29,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:08:29,552 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-19 01:08:29,552 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:08:29,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:08:29,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:08:29,718 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:08:29,719 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 01:08:29,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:08:29 BoogieIcfgContainer [2020-08-19 01:08:29,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:08:29,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:08:29,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:08:29,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:08:29,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:08:29" (1/3) ... [2020-08-19 01:08:29,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8aab57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:08:29, skipping insertion in model container [2020-08-19 01:08:29,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:29" (2/3) ... [2020-08-19 01:08:29,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8aab57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:08:29, skipping insertion in model container [2020-08-19 01:08:29,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:08:29" (3/3) ... [2020-08-19 01:08:29,731 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i15_o15-2.c [2020-08-19 01:08:29,742 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:08:29,749 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 01:08:29,762 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 01:08:29,786 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:08:29,786 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:08:29,787 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:08:29,787 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:08:29,787 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:08:29,787 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:08:29,787 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:08:29,788 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:08:29,806 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-19 01:08:29,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 01:08:29,811 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:29,812 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:29,813 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:29,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:29,817 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-19 01:08:29,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:29,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664682261] [2020-08-19 01:08:29,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:30,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:30,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:08:30,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664682261] [2020-08-19 01:08:30,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:08:30,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:08:30,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615690658] [2020-08-19 01:08:30,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:08:30,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:30,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:08:30,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:08:30,231 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-19 01:08:30,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:30,315 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-19 01:08:30,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:08:30,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 01:08:30,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:30,326 INFO L225 Difference]: With dead ends: 30 [2020-08-19 01:08:30,327 INFO L226 Difference]: Without dead ends: 18 [2020-08-19 01:08:30,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:08:30,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-19 01:08:30,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-19 01:08:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 01:08:30,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-19 01:08:30,369 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-19 01:08:30,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:30,369 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-19 01:08:30,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:08:30,370 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-19 01:08:30,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 01:08:30,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:30,372 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:30,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:08:30,373 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:30,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:30,374 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-19 01:08:30,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:30,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924825162] [2020-08-19 01:08:30,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:30,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:30,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:30,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 01:08:30,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924825162] [2020-08-19 01:08:30,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:30,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 01:08:30,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837031154] [2020-08-19 01:08:30,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 01:08:30,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:30,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 01:08:30,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:08:30,513 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-19 01:08:30,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:30,574 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-19 01:08:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 01:08:30,575 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-19 01:08:30,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:30,577 INFO L225 Difference]: With dead ends: 25 [2020-08-19 01:08:30,577 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 01:08:30,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:08:30,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 01:08:30,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-19 01:08:30,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 01:08:30,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-19 01:08:30,586 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-19 01:08:30,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:30,586 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-19 01:08:30,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 01:08:30,587 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-19 01:08:30,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 01:08:30,588 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:30,588 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:30,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:08:30,589 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:30,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:30,590 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-19 01:08:30,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:30,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354940801] [2020-08-19 01:08:30,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:30,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:30,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:30,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:30,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:30,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 01:08:30,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354940801] [2020-08-19 01:08:30,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:30,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 01:08:30,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547069291] [2020-08-19 01:08:30,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 01:08:30,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:30,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 01:08:30,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 01:08:30,752 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-19 01:08:30,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:30,819 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-19 01:08:30,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 01:08:30,820 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-19 01:08:30,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:30,821 INFO L225 Difference]: With dead ends: 28 [2020-08-19 01:08:30,822 INFO L226 Difference]: Without dead ends: 24 [2020-08-19 01:08:30,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-19 01:08:30,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-19 01:08:30,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-19 01:08:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-19 01:08:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-19 01:08:30,831 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-19 01:08:30,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:30,832 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-19 01:08:30,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 01:08:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-19 01:08:30,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 01:08:30,833 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:30,834 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:30,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 01:08:30,834 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:30,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:30,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-19 01:08:30,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:30,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154190865] [2020-08-19 01:08:30,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:30,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:30,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:30,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:30,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:30,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-19 01:08:31,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154190865] [2020-08-19 01:08:31,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:31,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 01:08:31,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118148338] [2020-08-19 01:08:31,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 01:08:31,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:31,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 01:08:31,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:08:31,025 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-19 01:08:31,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:31,133 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-19 01:08:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 01:08:31,134 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-19 01:08:31,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:31,136 INFO L225 Difference]: With dead ends: 31 [2020-08-19 01:08:31,136 INFO L226 Difference]: Without dead ends: 27 [2020-08-19 01:08:31,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-19 01:08:31,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-19 01:08:31,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-19 01:08:31,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-19 01:08:31,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-19 01:08:31,145 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-19 01:08:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:31,145 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-19 01:08:31,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 01:08:31,146 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-19 01:08:31,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-19 01:08:31,147 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:31,148 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:31,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 01:08:31,148 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:31,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:31,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-19 01:08:31,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:31,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431110287] [2020-08-19 01:08:31,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-19 01:08:31,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431110287] [2020-08-19 01:08:31,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:31,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 01:08:31,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496507299] [2020-08-19 01:08:31,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 01:08:31,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:31,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 01:08:31,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-19 01:08:31,361 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-19 01:08:31,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:31,459 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-19 01:08:31,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 01:08:31,460 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-19 01:08:31,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:31,462 INFO L225 Difference]: With dead ends: 34 [2020-08-19 01:08:31,462 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 01:08:31,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-19 01:08:31,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 01:08:31,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 01:08:31,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 01:08:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-19 01:08:31,470 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-19 01:08:31,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:31,471 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-19 01:08:31,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 01:08:31,471 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-19 01:08:31,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-19 01:08:31,473 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:31,473 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:31,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 01:08:31,473 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:31,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:31,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-19 01:08:31,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:31,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840837152] [2020-08-19 01:08:31,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-19 01:08:31,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840837152] [2020-08-19 01:08:31,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:31,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 01:08:31,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120426237] [2020-08-19 01:08:31,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 01:08:31,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:31,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 01:08:31,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-19 01:08:31,663 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-19 01:08:31,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:31,752 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-19 01:08:31,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 01:08:31,752 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-19 01:08:31,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:31,754 INFO L225 Difference]: With dead ends: 37 [2020-08-19 01:08:31,754 INFO L226 Difference]: Without dead ends: 33 [2020-08-19 01:08:31,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-19 01:08:31,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-19 01:08:31,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-19 01:08:31,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 01:08:31,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-19 01:08:31,762 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-19 01:08:31,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:31,762 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-19 01:08:31,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 01:08:31,763 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-19 01:08:31,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-19 01:08:31,764 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:31,764 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:31,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 01:08:31,765 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:31,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:31,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-19 01:08:31,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:31,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859576291] [2020-08-19 01:08:31,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:31,969 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-19 01:08:31,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859576291] [2020-08-19 01:08:31,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:31,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 01:08:31,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089980304] [2020-08-19 01:08:31,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 01:08:31,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:31,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 01:08:31,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-19 01:08:31,972 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-19 01:08:32,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:32,084 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-19 01:08:32,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 01:08:32,084 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-19 01:08:32,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:32,086 INFO L225 Difference]: With dead ends: 40 [2020-08-19 01:08:32,086 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 01:08:32,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-19 01:08:32,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 01:08:32,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-19 01:08:32,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-19 01:08:32,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-19 01:08:32,093 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-19 01:08:32,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:32,094 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-19 01:08:32,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 01:08:32,094 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-19 01:08:32,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 01:08:32,095 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:32,096 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:32,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 01:08:32,096 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:32,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:32,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-19 01:08:32,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:32,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016591339] [2020-08-19 01:08:32,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:32,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-19 01:08:32,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016591339] [2020-08-19 01:08:32,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:32,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 01:08:32,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195537929] [2020-08-19 01:08:32,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 01:08:32,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:32,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 01:08:32,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-19 01:08:32,307 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-19 01:08:32,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:32,426 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-19 01:08:32,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 01:08:32,427 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-19 01:08:32,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:32,428 INFO L225 Difference]: With dead ends: 43 [2020-08-19 01:08:32,428 INFO L226 Difference]: Without dead ends: 39 [2020-08-19 01:08:32,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-19 01:08:32,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-19 01:08:32,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-19 01:08:32,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 01:08:32,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-19 01:08:32,436 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-19 01:08:32,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:32,437 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-19 01:08:32,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 01:08:32,437 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-19 01:08:32,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 01:08:32,438 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:32,438 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:32,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 01:08:32,439 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:32,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:32,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-19 01:08:32,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:32,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137418902] [2020-08-19 01:08:32,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:32,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-19 01:08:32,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137418902] [2020-08-19 01:08:32,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:32,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 01:08:32,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113180515] [2020-08-19 01:08:32,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 01:08:32,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:32,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 01:08:32,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-19 01:08:32,792 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-19 01:08:32,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:32,919 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-19 01:08:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 01:08:32,919 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-19 01:08:32,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:32,921 INFO L225 Difference]: With dead ends: 46 [2020-08-19 01:08:32,921 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 01:08:32,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-19 01:08:32,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 01:08:32,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-19 01:08:32,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 01:08:32,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-19 01:08:32,929 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-19 01:08:32,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:32,929 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-19 01:08:32,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 01:08:32,930 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-19 01:08:32,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-19 01:08:32,931 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:32,931 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:32,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 01:08:32,931 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:32,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:32,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-19 01:08:32,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:32,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510058621] [2020-08-19 01:08:32,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:32,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:32,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-19 01:08:33,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510058621] [2020-08-19 01:08:33,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:33,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 01:08:33,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596995395] [2020-08-19 01:08:33,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 01:08:33,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:33,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 01:08:33,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-19 01:08:33,248 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-19 01:08:33,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:33,409 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-19 01:08:33,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 01:08:33,409 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-19 01:08:33,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:33,411 INFO L225 Difference]: With dead ends: 49 [2020-08-19 01:08:33,411 INFO L226 Difference]: Without dead ends: 45 [2020-08-19 01:08:33,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-19 01:08:33,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-19 01:08:33,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-19 01:08:33,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 01:08:33,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-19 01:08:33,418 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-19 01:08:33,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:33,419 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-19 01:08:33,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 01:08:33,419 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-19 01:08:33,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-19 01:08:33,420 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:33,420 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:33,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 01:08:33,421 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:33,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:33,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-19 01:08:33,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:33,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737185389] [2020-08-19 01:08:33,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-19 01:08:33,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737185389] [2020-08-19 01:08:33,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:33,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 01:08:33,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760655713] [2020-08-19 01:08:33,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 01:08:33,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:33,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 01:08:33,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-19 01:08:33,772 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-19 01:08:33,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:33,920 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-19 01:08:33,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 01:08:33,921 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-19 01:08:33,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:33,922 INFO L225 Difference]: With dead ends: 52 [2020-08-19 01:08:33,923 INFO L226 Difference]: Without dead ends: 48 [2020-08-19 01:08:33,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-19 01:08:33,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-19 01:08:33,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-19 01:08:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 01:08:33,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-19 01:08:33,930 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-19 01:08:33,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:33,930 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-19 01:08:33,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 01:08:33,931 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-19 01:08:33,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-19 01:08:33,932 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:33,932 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:33,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 01:08:33,933 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:33,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:33,933 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-19 01:08:33,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:33,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421378827] [2020-08-19 01:08:33,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:33,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-19 01:08:34,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421378827] [2020-08-19 01:08:34,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:34,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 01:08:34,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206827705] [2020-08-19 01:08:34,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 01:08:34,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:34,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 01:08:34,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-19 01:08:34,354 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-19 01:08:34,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:34,525 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-19 01:08:34,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 01:08:34,526 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-19 01:08:34,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:34,527 INFO L225 Difference]: With dead ends: 55 [2020-08-19 01:08:34,527 INFO L226 Difference]: Without dead ends: 51 [2020-08-19 01:08:34,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-19 01:08:34,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-19 01:08:34,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-19 01:08:34,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-19 01:08:34,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-19 01:08:34,535 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-19 01:08:34,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:34,536 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-19 01:08:34,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 01:08:34,536 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-19 01:08:34,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-19 01:08:34,537 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:34,537 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:34,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 01:08:34,537 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:34,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:34,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-19 01:08:34,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:34,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962102015] [2020-08-19 01:08:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-19 01:08:34,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962102015] [2020-08-19 01:08:34,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:34,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 01:08:34,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791532205] [2020-08-19 01:08:34,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 01:08:34,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:34,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 01:08:34,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-19 01:08:34,996 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-19 01:08:35,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:35,165 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-19 01:08:35,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 01:08:35,166 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-19 01:08:35,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:35,167 INFO L225 Difference]: With dead ends: 58 [2020-08-19 01:08:35,167 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 01:08:35,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-19 01:08:35,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 01:08:35,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-19 01:08:35,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 01:08:35,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-19 01:08:35,174 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-19 01:08:35,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:35,174 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-19 01:08:35,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 01:08:35,175 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-19 01:08:35,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-19 01:08:35,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:35,176 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:35,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 01:08:35,176 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:35,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:35,177 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-19 01:08:35,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:35,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925112325] [2020-08-19 01:08:35,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:35,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:35,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:35,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:35,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:35,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:35,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:35,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:35,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:35,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:35,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:35,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:35,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:35,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:35,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:35,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:35,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-19 01:08:35,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925112325] [2020-08-19 01:08:35,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:35,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 01:08:35,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706303737] [2020-08-19 01:08:35,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 01:08:35,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:35,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 01:08:35,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-19 01:08:35,720 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-19 01:08:35,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:35,908 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-19 01:08:35,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 01:08:35,909 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-19 01:08:35,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:35,910 INFO L225 Difference]: With dead ends: 61 [2020-08-19 01:08:35,910 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 01:08:35,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-19 01:08:35,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 01:08:35,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-19 01:08:35,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-19 01:08:35,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-19 01:08:35,917 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-19 01:08:35,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:35,918 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-19 01:08:35,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 01:08:35,918 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-19 01:08:35,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-19 01:08:35,919 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:35,919 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:35,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 01:08:35,919 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:35,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:35,920 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-19 01:08:35,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:35,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422688325] [2020-08-19 01:08:35,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:35,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:35,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:35,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:36,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:36,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:36,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:36,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:36,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:36,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:36,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:36,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:36,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:36,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:36,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:36,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:36,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-19 01:08:36,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422688325] [2020-08-19 01:08:36,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:36,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 01:08:36,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009581045] [2020-08-19 01:08:36,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 01:08:36,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:36,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 01:08:36,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-19 01:08:36,470 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-19 01:08:36,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:36,681 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-19 01:08:36,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 01:08:36,681 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-19 01:08:36,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:36,682 INFO L225 Difference]: With dead ends: 64 [2020-08-19 01:08:36,682 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 01:08:36,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-19 01:08:36,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 01:08:36,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-19 01:08:36,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-19 01:08:36,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-19 01:08:36,689 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-19 01:08:36,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:36,690 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-19 01:08:36,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 01:08:36,690 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-19 01:08:36,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-19 01:08:36,691 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:36,691 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:36,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 01:08:36,692 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:36,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:36,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-19 01:08:36,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:36,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055570340] [2020-08-19 01:08:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 01:08:36,712 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 01:08:36,713 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 01:08:36,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 01:08:36,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 01:08:36 BoogieIcfgContainer [2020-08-19 01:08:36,777 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 01:08:36,780 INFO L168 Benchmark]: Toolchain (without parser) took 7619.73 ms. Allocated memory was 147.3 MB in the beginning and 338.7 MB in the end (delta: 191.4 MB). Free memory was 103.4 MB in the beginning and 146.9 MB in the end (delta: -43.6 MB). Peak memory consumption was 147.8 MB. Max. memory is 7.1 GB. [2020-08-19 01:08:36,780 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 01:08:36,783 INFO L168 Benchmark]: CACSL2BoogieTranslator took 214.09 ms. Allocated memory is still 147.3 MB. Free memory was 102.9 MB in the beginning and 93.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-08-19 01:08:36,787 INFO L168 Benchmark]: Boogie Preprocessor took 23.81 ms. Allocated memory is still 147.3 MB. Free memory was 93.9 MB in the beginning and 92.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-19 01:08:36,788 INFO L168 Benchmark]: RCFGBuilder took 324.11 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 92.4 MB in the beginning and 171.3 MB in the end (delta: -78.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-19 01:08:36,788 INFO L168 Benchmark]: TraceAbstraction took 7052.78 ms. Allocated memory was 203.4 MB in the beginning and 338.7 MB in the end (delta: 135.3 MB). Free memory was 170.6 MB in the beginning and 146.9 MB in the end (delta: 23.7 MB). Peak memory consumption was 158.9 MB. Max. memory is 7.1 GB. [2020-08-19 01:08:36,795 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 214.09 ms. Allocated memory is still 147.3 MB. Free memory was 102.9 MB in the beginning and 93.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.81 ms. Allocated memory is still 147.3 MB. Free memory was 93.9 MB in the beginning and 92.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 324.11 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 92.4 MB in the beginning and 171.3 MB in the end (delta: -78.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7052.78 ms. Allocated memory was 203.4 MB in the beginning and 338.7 MB in the end (delta: 135.3 MB). Free memory was 170.6 MB in the beginning and 146.9 MB in the end (delta: 23.7 MB). Peak memory consumption was 158.9 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] int input = 15; [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 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; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 15 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.9s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 199 SDtfs, 318 SDslu, 762 SDs, 0 SdLazy, 455 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 928 NumberOfCodeBlocks, 928 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 810 ConstructedInterpolants, 0 QuantifiedInterpolants, 133800 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 1575/3150 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...