/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 04:22:53,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 04:22:53,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 04:22:53,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 04:22:53,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 04:22:53,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 04:22:53,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 04:22:53,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 04:22:53,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 04:22:53,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 04:22:53,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 04:22:53,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 04:22:53,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 04:22:53,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 04:22:53,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 04:22:53,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 04:22:53,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 04:22:53,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 04:22:53,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 04:22:53,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 04:22:53,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 04:22:53,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 04:22:53,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 04:22:53,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 04:22:53,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 04:22:53,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 04:22:53,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 04:22:53,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 04:22:53,161 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 04:22:53,182 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 04:22:53,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 04:22:53,183 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 04:22:53,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 04:22:53,184 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 04:22:53,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 04:22:53,184 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 04:22:53,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 04:22:53,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 04:22:53,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 04:22:53,185 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 04:22:53,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 04:22:53,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 04:22:53,186 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 04:22:53,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 04:22:53,186 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 04:22:53,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 04:22:53,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 04:22:53,187 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 04:22:53,187 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 04:22:53,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 04:22:53,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:22:53,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 04:22:53,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 04:22:53,188 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 04:22:53,188 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 04:22:53,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 04:22:53,188 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 04:22:53,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 04:22:53,189 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=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; [2020-08-19 04:22:53,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 04:22:53,503 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 04:22:53,507 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 04:22:53,508 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 04:22:53,509 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 04:22:53,509 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o20.c [2020-08-19 04:22:53,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2ce348da/41fed76ed86347d98a5bacd5395c5480/FLAG2128218ed [2020-08-19 04:22:54,005 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 04:22:54,005 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o20.c [2020-08-19 04:22:54,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2ce348da/41fed76ed86347d98a5bacd5395c5480/FLAG2128218ed [2020-08-19 04:22:54,450 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2ce348da/41fed76ed86347d98a5bacd5395c5480 [2020-08-19 04:22:54,460 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 04:22:54,462 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 04:22:54,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 04:22:54,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 04:22:54,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 04:22:54,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:22:54" (1/1) ... [2020-08-19 04:22:54,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2356d200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:54, skipping insertion in model container [2020-08-19 04:22:54,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:22:54" (1/1) ... [2020-08-19 04:22:54,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 04:22:54,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 04:22:54,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:22:54,662 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 04:22:54,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:22:54,690 INFO L208 MainTranslator]: Completed translation [2020-08-19 04:22:54,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:54 WrapperNode [2020-08-19 04:22:54,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 04:22:54,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 04:22:54,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 04:22:54,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 04:22:54,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:54" (1/1) ... [2020-08-19 04:22:54,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:54" (1/1) ... [2020-08-19 04:22:54,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:54" (1/1) ... [2020-08-19 04:22:54,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:54" (1/1) ... [2020-08-19 04:22:54,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:54" (1/1) ... [2020-08-19 04:22:54,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:54" (1/1) ... [2020-08-19 04:22:54,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:54" (1/1) ... [2020-08-19 04:22:54,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 04:22:54,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 04:22:54,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 04:22:54,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 04:22:54,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:54" (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 04:22:54,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 04:22:54,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 04:22:54,850 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-19 04:22:54,850 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 04:22:54,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-19 04:22:54,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 04:22:54,850 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-19 04:22:54,851 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 04:22:54,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 04:22:54,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 04:22:55,000 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 04:22:55,000 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 04:22:55,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:22:55 BoogieIcfgContainer [2020-08-19 04:22:55,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 04:22:55,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 04:22:55,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 04:22:55,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 04:22:55,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 04:22:54" (1/3) ... [2020-08-19 04:22:55,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b4c0bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:22:55, skipping insertion in model container [2020-08-19 04:22:55,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:54" (2/3) ... [2020-08-19 04:22:55,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b4c0bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:22:55, skipping insertion in model container [2020-08-19 04:22:55,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:22:55" (3/3) ... [2020-08-19 04:22:55,012 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o20.c [2020-08-19 04:22:55,021 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 04:22:55,027 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 04:22:55,040 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 04:22:55,063 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 04:22:55,064 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 04:22:55,064 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 04:22:55,064 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 04:22:55,064 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 04:22:55,064 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 04:22:55,064 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 04:22:55,065 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 04:22:55,079 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-19 04:22:55,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 04:22:55,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:55,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:22:55,085 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:55,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:55,090 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-19 04:22:55,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:55,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958182188] [2020-08-19 04:22:55,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,418 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 04:22:55,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958182188] [2020-08-19 04:22:55,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:22:55,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 04:22:55,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768196419] [2020-08-19 04:22:55,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 04:22:55,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:55,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 04:22:55,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:22:55,444 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-19 04:22:55,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:55,490 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-19 04:22:55,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 04:22:55,492 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 04:22:55,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:55,502 INFO L225 Difference]: With dead ends: 32 [2020-08-19 04:22:55,502 INFO L226 Difference]: Without dead ends: 18 [2020-08-19 04:22:55,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:22:55,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-19 04:22:55,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-19 04:22:55,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 04:22:55,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-19 04:22:55,547 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-19 04:22:55,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:55,547 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-19 04:22:55,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 04:22:55,548 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-19 04:22:55,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 04:22:55,550 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:55,550 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 04:22:55,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 04:22:55,551 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:55,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:55,551 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-19 04:22:55,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:55,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25007314] [2020-08-19 04:22:55,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,757 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 04:22:55,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25007314] [2020-08-19 04:22:55,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:55,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 04:22:55,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969931608] [2020-08-19 04:22:55,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 04:22:55,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:55,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 04:22:55,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:22:55,762 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-08-19 04:22:55,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:55,798 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-19 04:22:55,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 04:22:55,799 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-19 04:22:55,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:55,800 INFO L225 Difference]: With dead ends: 25 [2020-08-19 04:22:55,800 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 04:22:55,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:22:55,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 04:22:55,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-19 04:22:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 04:22:55,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-19 04:22:55,808 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-19 04:22:55,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:55,809 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-19 04:22:55,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 04:22:55,809 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-19 04:22:55,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 04:22:55,810 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:55,811 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 04:22:55,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 04:22:55,811 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:55,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:55,812 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-19 04:22:55,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:55,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375330747] [2020-08-19 04:22:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:56,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:56,051 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 04:22:56,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375330747] [2020-08-19 04:22:56,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:56,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 04:22:56,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788772507] [2020-08-19 04:22:56,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 04:22:56,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:56,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 04:22:56,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:22:56,055 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-08-19 04:22:56,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:56,095 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-19 04:22:56,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 04:22:56,096 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-08-19 04:22:56,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:56,097 INFO L225 Difference]: With dead ends: 28 [2020-08-19 04:22:56,097 INFO L226 Difference]: Without dead ends: 24 [2020-08-19 04:22:56,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:22:56,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-19 04:22:56,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-19 04:22:56,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-19 04:22:56,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-19 04:22:56,105 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-19 04:22:56,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:56,106 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-19 04:22:56,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 04:22:56,106 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-19 04:22:56,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 04:22:56,107 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:56,108 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 04:22:56,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 04:22:56,108 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:56,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:56,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-19 04:22:56,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:56,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298973799] [2020-08-19 04:22:56,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:56,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:56,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:56,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:56,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:56,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:56,388 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 04:22:56,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298973799] [2020-08-19 04:22:56,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:56,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 04:22:56,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801016042] [2020-08-19 04:22:56,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 04:22:56,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:56,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 04:22:56,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-19 04:22:56,391 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-08-19 04:22:56,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:56,445 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-19 04:22:56,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 04:22:56,445 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-08-19 04:22:56,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:56,447 INFO L225 Difference]: With dead ends: 31 [2020-08-19 04:22:56,447 INFO L226 Difference]: Without dead ends: 27 [2020-08-19 04:22:56,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-19 04:22:56,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-19 04:22:56,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-19 04:22:56,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-19 04:22:56,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-19 04:22:56,454 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-19 04:22:56,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:56,454 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-19 04:22:56,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 04:22:56,455 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-19 04:22:56,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-19 04:22:56,456 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:56,456 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 04:22:56,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 04:22:56,457 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:56,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:56,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-19 04:22:56,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:56,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556223626] [2020-08-19 04:22:56,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:56,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:56,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:56,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:56,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:56,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:56,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:56,788 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 04:22:56,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556223626] [2020-08-19 04:22:56,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:56,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 04:22:56,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027141327] [2020-08-19 04:22:56,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 04:22:56,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:56,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 04:22:56,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-19 04:22:56,792 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-08-19 04:22:56,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:56,873 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-19 04:22:56,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 04:22:56,874 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-08-19 04:22:56,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:56,875 INFO L225 Difference]: With dead ends: 34 [2020-08-19 04:22:56,875 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 04:22:56,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-19 04:22:56,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 04:22:56,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 04:22:56,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 04:22:56,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-19 04:22:56,887 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-19 04:22:56,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:56,888 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-19 04:22:56,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 04:22:56,888 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-19 04:22:56,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-19 04:22:56,889 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:56,890 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 04:22:56,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 04:22:56,893 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:56,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:56,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-19 04:22:56,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:56,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116016866] [2020-08-19 04:22:56,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:56,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:56,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:57,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:57,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:57,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:57,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:57,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:57,257 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 04:22:57,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116016866] [2020-08-19 04:22:57,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:57,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 04:22:57,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868628538] [2020-08-19 04:22:57,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 04:22:57,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:57,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 04:22:57,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-19 04:22:57,260 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2020-08-19 04:22:57,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:57,365 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-19 04:22:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 04:22:57,366 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-08-19 04:22:57,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:57,367 INFO L225 Difference]: With dead ends: 37 [2020-08-19 04:22:57,367 INFO L226 Difference]: Without dead ends: 33 [2020-08-19 04:22:57,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-19 04:22:57,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-19 04:22:57,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-19 04:22:57,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 04:22:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-19 04:22:57,374 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-19 04:22:57,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:57,375 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-19 04:22:57,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 04:22:57,375 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-19 04:22:57,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-19 04:22:57,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:57,377 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 04:22:57,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 04:22:57,377 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:57,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:57,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-19 04:22:57,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:57,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625989131] [2020-08-19 04:22:57,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:57,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:57,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:57,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:57,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:57,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:57,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:57,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:57,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:57,744 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 04:22:57,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625989131] [2020-08-19 04:22:57,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:57,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 04:22:57,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898549357] [2020-08-19 04:22:57,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 04:22:57,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:57,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 04:22:57,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-19 04:22:57,746 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2020-08-19 04:22:57,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:57,862 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-19 04:22:57,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 04:22:57,863 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-08-19 04:22:57,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:57,864 INFO L225 Difference]: With dead ends: 40 [2020-08-19 04:22:57,864 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 04:22:57,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-19 04:22:57,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 04:22:57,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-19 04:22:57,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-19 04:22:57,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-19 04:22:57,871 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-19 04:22:57,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:57,871 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-19 04:22:57,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 04:22:57,872 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-19 04:22:57,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 04:22:57,873 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:57,873 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 04:22:57,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 04:22:57,873 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:57,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:57,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-19 04:22:57,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:57,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069059420] [2020-08-19 04:22:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:57,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:57,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:57,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,392 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 04:22:58,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069059420] [2020-08-19 04:22:58,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:58,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 04:22:58,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997324202] [2020-08-19 04:22:58,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 04:22:58,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:58,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 04:22:58,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-19 04:22:58,395 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 19 states. [2020-08-19 04:22:58,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:58,534 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-19 04:22:58,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 04:22:58,534 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-08-19 04:22:58,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:58,536 INFO L225 Difference]: With dead ends: 43 [2020-08-19 04:22:58,536 INFO L226 Difference]: Without dead ends: 39 [2020-08-19 04:22:58,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-19 04:22:58,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-19 04:22:58,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-19 04:22:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 04:22:58,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-19 04:22:58,543 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-19 04:22:58,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:58,543 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-19 04:22:58,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 04:22:58,543 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-19 04:22:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 04:22:58,544 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:58,545 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 04:22:58,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 04:22:58,545 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:58,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:58,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-19 04:22:58,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:58,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009318741] [2020-08-19 04:22:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:58,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:58,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,035 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 04:22:59,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009318741] [2020-08-19 04:22:59,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:59,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 04:22:59,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511981767] [2020-08-19 04:22:59,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 04:22:59,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:59,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 04:22:59,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-19 04:22:59,038 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 21 states. [2020-08-19 04:22:59,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:59,208 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-19 04:22:59,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 04:22:59,208 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-08-19 04:22:59,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:59,210 INFO L225 Difference]: With dead ends: 46 [2020-08-19 04:22:59,210 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 04:22:59,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-19 04:22:59,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 04:22:59,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-19 04:22:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 04:22:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-19 04:22:59,217 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-19 04:22:59,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:59,217 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-19 04:22:59,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 04:22:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-19 04:22:59,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-19 04:22:59,219 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:59,219 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 04:22:59,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 04:22:59,219 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:59,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:59,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-19 04:22:59,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:59,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268708355] [2020-08-19 04:22:59,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,803 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 04:22:59,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268708355] [2020-08-19 04:22:59,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:59,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 04:22:59,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608451154] [2020-08-19 04:22:59,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 04:22:59,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:59,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 04:22:59,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-19 04:22:59,805 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2020-08-19 04:22:59,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:59,996 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-19 04:22:59,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 04:22:59,996 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-08-19 04:22:59,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:59,998 INFO L225 Difference]: With dead ends: 49 [2020-08-19 04:22:59,998 INFO L226 Difference]: Without dead ends: 45 [2020-08-19 04:22:59,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-19 04:22:59,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-19 04:23:00,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-19 04:23:00,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 04:23:00,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-19 04:23:00,004 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-19 04:23:00,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:00,005 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-19 04:23:00,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 04:23:00,005 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-19 04:23:00,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-19 04:23:00,006 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:00,007 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 04:23:00,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 04:23:00,007 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:00,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:00,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-19 04:23:00,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:00,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829575511] [2020-08-19 04:23:00,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:23:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,658 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 04:23:00,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829575511] [2020-08-19 04:23:00,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:23:00,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 04:23:00,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679568670] [2020-08-19 04:23:00,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 04:23:00,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:00,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 04:23:00,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-19 04:23:00,661 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 25 states. [2020-08-19 04:23:00,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:00,929 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-19 04:23:00,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-19 04:23:00,929 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-19 04:23:00,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:00,931 INFO L225 Difference]: With dead ends: 52 [2020-08-19 04:23:00,931 INFO L226 Difference]: Without dead ends: 48 [2020-08-19 04:23:00,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-19 04:23:00,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-19 04:23:00,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-19 04:23:00,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 04:23:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-19 04:23:00,937 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-19 04:23:00,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:00,938 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-19 04:23:00,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 04:23:00,938 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-19 04:23:00,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-19 04:23:00,939 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:00,939 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 04:23:00,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 04:23:00,939 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:00,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:00,940 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-19 04:23:00,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:00,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745811677] [2020-08-19 04:23:00,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:23:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,717 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 04:23:01,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745811677] [2020-08-19 04:23:01,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:23:01,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-19 04:23:01,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337053915] [2020-08-19 04:23:01,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-19 04:23:01,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:01,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-19 04:23:01,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-08-19 04:23:01,720 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 27 states. [2020-08-19 04:23:01,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:01,960 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-19 04:23:01,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 04:23:01,961 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2020-08-19 04:23:01,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:01,962 INFO L225 Difference]: With dead ends: 55 [2020-08-19 04:23:01,962 INFO L226 Difference]: Without dead ends: 51 [2020-08-19 04:23:01,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-08-19 04:23:01,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-19 04:23:01,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-19 04:23:01,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-19 04:23:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-19 04:23:01,975 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-19 04:23:01,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:01,975 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-19 04:23:01,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-19 04:23:01,975 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-19 04:23:01,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-19 04:23:01,976 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:01,976 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 04:23:01,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 04:23:01,977 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:01,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:01,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-19 04:23:01,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:01,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250103682] [2020-08-19 04:23:01,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:23:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,948 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 04:23:02,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250103682] [2020-08-19 04:23:02,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:23:02,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-19 04:23:02,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285676173] [2020-08-19 04:23:02,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-19 04:23:02,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:02,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-19 04:23:02,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-19 04:23:02,952 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 29 states. [2020-08-19 04:23:03,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:03,269 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-19 04:23:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-19 04:23:03,270 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2020-08-19 04:23:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:03,272 INFO L225 Difference]: With dead ends: 58 [2020-08-19 04:23:03,272 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 04:23:03,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-19 04:23:03,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 04:23:03,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-19 04:23:03,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 04:23:03,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-19 04:23:03,280 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-19 04:23:03,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:03,280 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-19 04:23:03,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-19 04:23:03,281 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-19 04:23:03,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-19 04:23:03,282 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:03,282 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 04:23:03,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 04:23:03,282 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:03,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:03,283 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-19 04:23:03,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:03,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659847821] [2020-08-19 04:23:03,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:03,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:23:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,292 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 04:23:04,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659847821] [2020-08-19 04:23:04,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:23:04,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-19 04:23:04,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723869422] [2020-08-19 04:23:04,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-19 04:23:04,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:04,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-19 04:23:04,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-08-19 04:23:04,295 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 31 states. [2020-08-19 04:23:04,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:04,665 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-19 04:23:04,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-19 04:23:04,666 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2020-08-19 04:23:04,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:04,667 INFO L225 Difference]: With dead ends: 61 [2020-08-19 04:23:04,667 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 04:23:04,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-08-19 04:23:04,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 04:23:04,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-19 04:23:04,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-19 04:23:04,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-19 04:23:04,675 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-19 04:23:04,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:04,675 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-19 04:23:04,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-19 04:23:04,675 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-19 04:23:04,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-19 04:23:04,676 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:04,676 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 04:23:04,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 04:23:04,677 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:04,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:04,677 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-19 04:23:04,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:04,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765538575] [2020-08-19 04:23:04,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:23:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:05,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,867 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 04:23:05,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765538575] [2020-08-19 04:23:05,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:23:05,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-19 04:23:05,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714883738] [2020-08-19 04:23:05,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-19 04:23:05,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:05,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-19 04:23:05,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-19 04:23:05,872 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 33 states. [2020-08-19 04:23:06,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:06,271 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-19 04:23:06,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-19 04:23:06,271 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 97 [2020-08-19 04:23:06,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:06,272 INFO L225 Difference]: With dead ends: 64 [2020-08-19 04:23:06,272 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 04:23:06,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-19 04:23:06,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 04:23:06,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-19 04:23:06,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-19 04:23:06,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-19 04:23:06,292 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-19 04:23:06,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:06,293 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-19 04:23:06,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-19 04:23:06,293 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-19 04:23:06,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-19 04:23:06,302 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:06,302 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 04:23:06,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 04:23:06,302 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:06,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:06,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-19 04:23:06,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:06,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260446033] [2020-08-19 04:23:06,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:23:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:07,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:07,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:07,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:07,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:07,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:07,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-19 04:23:07,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260446033] [2020-08-19 04:23:07,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:23:07,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-19 04:23:07,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683369515] [2020-08-19 04:23:07,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-19 04:23:07,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:07,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-19 04:23:07,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-19 04:23:07,523 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-08-19 04:23:08,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:08,009 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-19 04:23:08,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-19 04:23:08,010 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-08-19 04:23:08,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:08,011 INFO L225 Difference]: With dead ends: 67 [2020-08-19 04:23:08,011 INFO L226 Difference]: Without dead ends: 63 [2020-08-19 04:23:08,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-19 04:23:08,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-19 04:23:08,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-19 04:23:08,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-19 04:23:08,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-19 04:23:08,018 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-19 04:23:08,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:08,019 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-19 04:23:08,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-19 04:23:08,019 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-19 04:23:08,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-19 04:23:08,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:08,020 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:08,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 04:23:08,021 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:08,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:08,021 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-19 04:23:08,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:08,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261397631] [2020-08-19 04:23:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:08,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:08,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:23:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:08,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:08,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:08,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:08,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:08,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:08,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:08,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:08,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:08,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:08,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:08,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:08,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:08,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:09,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:09,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:09,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-19 04:23:09,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261397631] [2020-08-19 04:23:09,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:23:09,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-19 04:23:09,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984148147] [2020-08-19 04:23:09,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-19 04:23:09,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:09,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-19 04:23:09,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-19 04:23:09,379 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 37 states. [2020-08-19 04:23:09,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:09,957 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-19 04:23:09,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-19 04:23:09,963 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2020-08-19 04:23:09,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:09,964 INFO L225 Difference]: With dead ends: 70 [2020-08-19 04:23:09,964 INFO L226 Difference]: Without dead ends: 66 [2020-08-19 04:23:09,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-19 04:23:09,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-19 04:23:09,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-19 04:23:09,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-19 04:23:09,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-19 04:23:09,970 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-19 04:23:09,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:09,971 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-19 04:23:09,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-19 04:23:09,971 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-19 04:23:09,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-19 04:23:09,972 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:09,972 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:09,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 04:23:09,972 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:09,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:09,973 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-19 04:23:09,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:09,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177392263] [2020-08-19 04:23:09,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:10,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:10,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:23:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:10,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:10,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:10,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:10,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:10,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:10,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:10,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:10,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:10,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:10,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:10,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:10,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:11,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:11,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:11,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:11,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:11,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:11,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-19 04:23:11,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177392263] [2020-08-19 04:23:11,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:23:11,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-19 04:23:11,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160135936] [2020-08-19 04:23:11,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-19 04:23:11,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:11,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-19 04:23:11,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-08-19 04:23:11,827 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 39 states. [2020-08-19 04:23:12,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:12,459 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-19 04:23:12,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-19 04:23:12,459 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2020-08-19 04:23:12,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:12,460 INFO L225 Difference]: With dead ends: 73 [2020-08-19 04:23:12,461 INFO L226 Difference]: Without dead ends: 69 [2020-08-19 04:23:12,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-08-19 04:23:12,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-19 04:23:12,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-19 04:23:12,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-19 04:23:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-19 04:23:12,475 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-19 04:23:12,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:12,475 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-19 04:23:12,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-19 04:23:12,475 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-19 04:23:12,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-19 04:23:12,477 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:12,477 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:12,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 04:23:12,477 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:12,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:12,478 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-08-19 04:23:12,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:12,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129899643] [2020-08-19 04:23:12,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:12,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:12,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:23:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:12,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:12,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:12,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:12,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:12,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:12,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:12,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:12,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:13,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:13,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:13,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:13,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:13,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:13,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:13,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:13,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:13,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:13,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:14,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:14,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-19 04:23:14,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129899643] [2020-08-19 04:23:14,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:23:14,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-19 04:23:14,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88439342] [2020-08-19 04:23:14,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-19 04:23:14,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:14,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-19 04:23:14,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-19 04:23:14,335 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 41 states. [2020-08-19 04:23:15,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:15,048 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-19 04:23:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-19 04:23:15,049 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 121 [2020-08-19 04:23:15,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:15,050 INFO L225 Difference]: With dead ends: 76 [2020-08-19 04:23:15,051 INFO L226 Difference]: Without dead ends: 72 [2020-08-19 04:23:15,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-19 04:23:15,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-19 04:23:15,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-19 04:23:15,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-19 04:23:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-19 04:23:15,056 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-19 04:23:15,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:15,056 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-19 04:23:15,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-19 04:23:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-19 04:23:15,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-19 04:23:15,058 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:15,058 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:15,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 04:23:15,058 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:15,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:15,059 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-08-19 04:23:15,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:15,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651753577] [2020-08-19 04:23:15,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:15,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:15,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:23:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:15,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:15,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:15,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:15,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:15,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:15,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:15,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:15,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:15,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:16,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:16,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:16,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:16,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:16,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:16,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:16,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:16,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:16,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:16,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:16,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-19 04:23:17,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651753577] [2020-08-19 04:23:17,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:23:17,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-19 04:23:17,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838028664] [2020-08-19 04:23:17,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-19 04:23:17,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:17,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-19 04:23:17,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-08-19 04:23:17,147 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 43 states. [2020-08-19 04:23:17,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:17,871 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-19 04:23:17,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-19 04:23:17,872 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2020-08-19 04:23:17,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:17,873 INFO L225 Difference]: With dead ends: 79 [2020-08-19 04:23:17,873 INFO L226 Difference]: Without dead ends: 75 [2020-08-19 04:23:17,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-08-19 04:23:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-19 04:23:17,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-19 04:23:17,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-19 04:23:17,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-19 04:23:17,882 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-19 04:23:17,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:17,883 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-19 04:23:17,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-19 04:23:17,884 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-19 04:23:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-19 04:23:17,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:17,885 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:17,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 04:23:17,886 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:17,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:17,886 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-08-19 04:23:17,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:17,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006261646] [2020-08-19 04:23:17,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 04:23:18,001 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 04:23:18,001 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 04:23:18,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 04:23:18,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 04:23:18 BoogieIcfgContainer [2020-08-19 04:23:18,051 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 04:23:18,053 INFO L168 Benchmark]: Toolchain (without parser) took 23590.98 ms. Allocated memory was 140.0 MB in the beginning and 516.9 MB in the end (delta: 377.0 MB). Free memory was 102.9 MB in the beginning and 318.8 MB in the end (delta: -215.8 MB). Peak memory consumption was 161.1 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:18,054 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 04:23:18,054 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.00 ms. Allocated memory is still 140.0 MB. Free memory was 102.7 MB in the beginning and 93.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:18,055 INFO L168 Benchmark]: Boogie Preprocessor took 22.45 ms. Allocated memory is still 140.0 MB. Free memory was 93.5 MB in the beginning and 92.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:18,056 INFO L168 Benchmark]: RCFGBuilder took 289.74 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.1 MB in the beginning and 170.5 MB in the end (delta: -78.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:18,056 INFO L168 Benchmark]: TraceAbstraction took 23045.99 ms. Allocated memory was 202.4 MB in the beginning and 516.9 MB in the end (delta: 314.6 MB). Free memory was 169.9 MB in the beginning and 318.8 MB in the end (delta: -148.9 MB). Peak memory consumption was 165.7 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:18,059 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 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 228.00 ms. Allocated memory is still 140.0 MB. Free memory was 102.7 MB in the beginning and 93.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.45 ms. Allocated memory is still 140.0 MB. Free memory was 93.5 MB in the beginning and 92.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 289.74 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.1 MB in the beginning and 170.5 MB in the end (delta: -78.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23045.99 ms. Allocated memory was 202.4 MB in the beginning and 516.9 MB in the end (delta: 314.6 MB). Free memory was 169.9 MB in the beginning and 318.8 MB in the end (delta: -148.9 MB). Peak memory consumption was 165.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] unsigned int result = id(input); [L12] COND TRUE result == 20 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 22.9s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 684 SDtfs, 2 SDslu, 14532 SDs, 0 SdLazy, 8656 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 940 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 440 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 16.0s InterpolantComputationTime, 1533 NumberOfCodeBlocks, 1533 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1380 ConstructedInterpolants, 0 QuantifiedInterpolants, 465600 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 1 PerfectInterpolantSequences, 3800/7600 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...