/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_15x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:50:45,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:50:45,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:50:45,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:50:45,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:50:45,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:50:45,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:50:45,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:50:45,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:50:45,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:50:45,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:50:45,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:50:45,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:50:45,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:50:45,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:50:45,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:50:45,179 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:50:45,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:50:45,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:50:45,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:50:45,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:50:45,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:50:45,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:50:45,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:50:45,202 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 03:50:45,202 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 03:50:45,202 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 03:50:45,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 03:50:45,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 03:50:45,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 03:50:45,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:50:45,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:50:45,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:50:45,218 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 [2020-08-22 03:50:45,266 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:50:45,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:50:45,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:50:45,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:50:45,269 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:50:45,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:50:45,269 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:50:45,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:50:45,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:50:45,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:50:45,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:50:45,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:50:45,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:50:45,271 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:50:45,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:50:45,271 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:50:45,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:50:45,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:50:45,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:50:45,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:50:45,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:50:45,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:50:45,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:50:45,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:50:45,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:50:45,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:50:45,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:50:45,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:50:45,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:50:45,274 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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-08-22 03:50:45,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:50:45,600 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:50:45,605 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:50:45,607 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:50:45,607 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:50:45,608 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-08-22 03:50:45,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f5b61ebd/329dbc8d03634f14b505a888b78d27c5/FLAGe91cf9cc7 [2020-08-22 03:50:46,124 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:50:46,125 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-08-22 03:50:46,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f5b61ebd/329dbc8d03634f14b505a888b78d27c5/FLAGe91cf9cc7 [2020-08-22 03:50:46,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f5b61ebd/329dbc8d03634f14b505a888b78d27c5 [2020-08-22 03:50:46,521 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:50:46,523 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:50:46,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:50:46,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:50:46,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:50:46,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:50:46" (1/1) ... [2020-08-22 03:50:46,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23b5e0fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:46, skipping insertion in model container [2020-08-22 03:50:46,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:50:46" (1/1) ... [2020-08-22 03:50:46,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:50:46,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:50:46,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:50:46,717 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:50:46,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:50:46,753 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:50:46,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:46 WrapperNode [2020-08-22 03:50:46,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:50:46,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:50:46,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:50:46,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:50:46,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:46" (1/1) ... [2020-08-22 03:50:46,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:46" (1/1) ... [2020-08-22 03:50:46,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:46" (1/1) ... [2020-08-22 03:50:46,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:46" (1/1) ... [2020-08-22 03:50:46,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:46" (1/1) ... [2020-08-22 03:50:46,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:46" (1/1) ... [2020-08-22 03:50:46,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:46" (1/1) ... [2020-08-22 03:50:46,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:50:46,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:50:46,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:50:46,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:50:46,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:46" (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 [2020-08-22 03:50:46,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:50:46,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:50:46,925 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-22 03:50:46,926 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:50:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:50:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-22 03:50:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:50:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:50:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:50:47,114 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:50:47,114 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 03:50:47,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:50:47 BoogieIcfgContainer [2020-08-22 03:50:47,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:50:47,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:50:47,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:50:47,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:50:47,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:50:46" (1/3) ... [2020-08-22 03:50:47,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53197efe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:50:47, skipping insertion in model container [2020-08-22 03:50:47,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:46" (2/3) ... [2020-08-22 03:50:47,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53197efe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:50:47, skipping insertion in model container [2020-08-22 03:50:47,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:50:47" (3/3) ... [2020-08-22 03:50:47,127 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2020-08-22 03:50:47,136 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:50:47,142 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:50:47,157 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:50:47,182 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:50:47,182 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:50:47,182 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:50:47,182 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:50:47,183 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:50:47,183 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:50:47,183 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:50:47,183 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:50:47,199 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 03:50:47,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 03:50:47,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:47,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:47,206 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:47,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:47,211 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-22 03:50:47,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:47,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66152102] [2020-08-22 03:50:47,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:50:47,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66152102] [2020-08-22 03:50:47,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:50:47,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 03:50:47,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341007348] [2020-08-22 03:50:47,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:50:47,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:47,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:50:47,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:50:47,515 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-22 03:50:47,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:47,607 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-22 03:50:47,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:50:47,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 03:50:47,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:47,621 INFO L225 Difference]: With dead ends: 30 [2020-08-22 03:50:47,621 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 03:50:47,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:50:47,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 03:50:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 03:50:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 03:50:47,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 03:50:47,670 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-22 03:50:47,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:47,671 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 03:50:47,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:50:47,672 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 03:50:47,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 03:50:47,674 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:47,674 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:47,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:50:47,675 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:47,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:47,675 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-22 03:50:47,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:47,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495564454] [2020-08-22 03:50:47,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 03:50:47,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495564454] [2020-08-22 03:50:47,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:47,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 03:50:47,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470773266] [2020-08-22 03:50:47,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 03:50:47,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:47,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 03:50:47,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:50:47,834 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-22 03:50:47,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:47,935 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-22 03:50:47,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 03:50:47,936 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-22 03:50:47,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:47,937 INFO L225 Difference]: With dead ends: 25 [2020-08-22 03:50:47,938 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 03:50:47,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:50:47,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 03:50:47,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 03:50:47,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 03:50:47,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 03:50:47,946 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-22 03:50:47,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:47,947 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 03:50:47,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 03:50:47,947 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 03:50:47,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 03:50:47,949 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:47,949 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:47,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:50:47,949 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:47,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:47,950 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-22 03:50:47,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:47,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998860660] [2020-08-22 03:50:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 03:50:48,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998860660] [2020-08-22 03:50:48,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:48,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 03:50:48,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493430003] [2020-08-22 03:50:48,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 03:50:48,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:48,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 03:50:48,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:50:48,178 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-22 03:50:48,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:48,250 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-22 03:50:48,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 03:50:48,251 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-22 03:50:48,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:48,252 INFO L225 Difference]: With dead ends: 28 [2020-08-22 03:50:48,252 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 03:50:48,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:50:48,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 03:50:48,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 03:50:48,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 03:50:48,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 03:50:48,260 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-22 03:50:48,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:48,261 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 03:50:48,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 03:50:48,261 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 03:50:48,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 03:50:48,263 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:48,263 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:48,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:50:48,263 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:48,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:48,264 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-22 03:50:48,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:48,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394693369] [2020-08-22 03:50:48,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 03:50:48,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394693369] [2020-08-22 03:50:48,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:48,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 03:50:48,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272291381] [2020-08-22 03:50:48,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 03:50:48,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:48,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 03:50:48,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:50:48,437 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-22 03:50:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:48,559 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-22 03:50:48,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 03:50:48,560 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-22 03:50:48,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:48,561 INFO L225 Difference]: With dead ends: 31 [2020-08-22 03:50:48,561 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 03:50:48,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-22 03:50:48,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 03:50:48,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 03:50:48,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 03:50:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 03:50:48,569 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-22 03:50:48,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:48,569 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 03:50:48,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 03:50:48,570 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 03:50:48,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 03:50:48,571 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:48,571 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:48,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:50:48,572 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:48,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:48,572 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-22 03:50:48,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:48,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732567388] [2020-08-22 03:50:48,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:48,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 03:50:48,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732567388] [2020-08-22 03:50:48,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:48,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 03:50:48,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98400577] [2020-08-22 03:50:48,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 03:50:48,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:48,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 03:50:48,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:50:48,744 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-22 03:50:48,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:48,846 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 03:50:48,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 03:50:48,846 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-22 03:50:48,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:48,848 INFO L225 Difference]: With dead ends: 34 [2020-08-22 03:50:48,848 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 03:50:48,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-22 03:50:48,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 03:50:48,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 03:50:48,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 03:50:48,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 03:50:48,855 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-22 03:50:48,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:48,856 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 03:50:48,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 03:50:48,856 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 03:50:48,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 03:50:48,858 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:48,858 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:48,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:50:48,858 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:48,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:48,859 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-22 03:50:48,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:48,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092990558] [2020-08-22 03:50:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 03:50:49,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092990558] [2020-08-22 03:50:49,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:49,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 03:50:49,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843960979] [2020-08-22 03:50:49,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 03:50:49,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:49,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 03:50:49,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:50:49,099 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-22 03:50:49,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:49,203 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-22 03:50:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 03:50:49,203 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-22 03:50:49,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:49,205 INFO L225 Difference]: With dead ends: 37 [2020-08-22 03:50:49,205 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 03:50:49,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-22 03:50:49,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 03:50:49,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 03:50:49,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 03:50:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 03:50:49,212 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-22 03:50:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:49,213 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 03:50:49,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 03:50:49,213 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 03:50:49,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 03:50:49,215 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:49,215 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:49,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:50:49,215 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:49,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:49,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-22 03:50:49,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:49,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920813749] [2020-08-22 03:50:49,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 03:50:49,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920813749] [2020-08-22 03:50:49,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:49,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 03:50:49,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878274535] [2020-08-22 03:50:49,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 03:50:49,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:49,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 03:50:49,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:50:49,513 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-22 03:50:49,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:49,621 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-22 03:50:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 03:50:49,622 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-22 03:50:49,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:49,623 INFO L225 Difference]: With dead ends: 40 [2020-08-22 03:50:49,623 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 03:50:49,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-22 03:50:49,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 03:50:49,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 03:50:49,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 03:50:49,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 03:50:49,631 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-22 03:50:49,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:49,631 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 03:50:49,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 03:50:49,632 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 03:50:49,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 03:50:49,633 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:49,633 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:49,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 03:50:49,633 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:49,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:49,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-22 03:50:49,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:49,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381713815] [2020-08-22 03:50:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 03:50:49,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381713815] [2020-08-22 03:50:49,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:49,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 03:50:49,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296738267] [2020-08-22 03:50:49,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 03:50:49,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:49,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 03:50:49,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-22 03:50:49,905 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-22 03:50:50,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:50,055 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-22 03:50:50,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 03:50:50,056 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-22 03:50:50,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:50,058 INFO L225 Difference]: With dead ends: 43 [2020-08-22 03:50:50,058 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 03:50:50,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-22 03:50:50,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 03:50:50,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-22 03:50:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 03:50:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 03:50:50,066 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-22 03:50:50,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:50,067 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 03:50:50,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 03:50:50,067 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 03:50:50,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 03:50:50,069 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:50,069 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:50,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 03:50:50,069 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:50,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:50,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-22 03:50:50,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:50,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739726738] [2020-08-22 03:50:50,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 03:50:50,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739726738] [2020-08-22 03:50:50,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:50,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 03:50:50,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163166235] [2020-08-22 03:50:50,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 03:50:50,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:50,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 03:50:50,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:50:50,365 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-22 03:50:50,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:50,519 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 03:50:50,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 03:50:50,520 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-22 03:50:50,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:50,521 INFO L225 Difference]: With dead ends: 46 [2020-08-22 03:50:50,521 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 03:50:50,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-22 03:50:50,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 03:50:50,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 03:50:50,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 03:50:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 03:50:50,534 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-22 03:50:50,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:50,534 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 03:50:50,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 03:50:50,534 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 03:50:50,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 03:50:50,537 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:50,538 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:50,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 03:50:50,538 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:50,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:50,539 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-22 03:50:50,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:50,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384217114] [2020-08-22 03:50:50,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 03:50:50,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384217114] [2020-08-22 03:50:50,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:50,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 03:50:50,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525619589] [2020-08-22 03:50:50,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 03:50:50,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:50,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 03:50:50,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-22 03:50:50,947 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-22 03:50:51,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:51,099 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 03:50:51,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 03:50:51,100 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-22 03:50:51,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:51,101 INFO L225 Difference]: With dead ends: 49 [2020-08-22 03:50:51,101 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 03:50:51,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-22 03:50:51,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 03:50:51,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 03:50:51,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 03:50:51,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 03:50:51,109 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-22 03:50:51,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:51,109 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 03:50:51,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 03:50:51,109 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 03:50:51,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 03:50:51,110 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:51,111 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:51,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 03:50:51,111 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:51,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:51,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-22 03:50:51,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:51,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732433086] [2020-08-22 03:50:51,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 03:50:51,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732433086] [2020-08-22 03:50:51,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:51,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 03:50:51,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108150130] [2020-08-22 03:50:51,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 03:50:51,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:51,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 03:50:51,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-22 03:50:51,520 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-22 03:50:51,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:51,707 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-22 03:50:51,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 03:50:51,707 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-22 03:50:51,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:51,709 INFO L225 Difference]: With dead ends: 52 [2020-08-22 03:50:51,709 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 03:50:51,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-22 03:50:51,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 03:50:51,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-22 03:50:51,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 03:50:51,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-22 03:50:51,716 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-22 03:50:51,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:51,716 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-22 03:50:51,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 03:50:51,717 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-22 03:50:51,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 03:50:51,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:51,718 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:51,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 03:50:51,719 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:51,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:51,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-08-22 03:50:51,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:51,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226209918] [2020-08-22 03:50:51,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 03:50:52,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226209918] [2020-08-22 03:50:52,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:52,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 03:50:52,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792941897] [2020-08-22 03:50:52,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 03:50:52,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:52,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 03:50:52,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-22 03:50:52,131 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-22 03:50:52,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:52,341 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-22 03:50:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 03:50:52,342 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-22 03:50:52,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:52,343 INFO L225 Difference]: With dead ends: 55 [2020-08-22 03:50:52,343 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 03:50:52,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-22 03:50:52,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 03:50:52,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-22 03:50:52,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 03:50:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-22 03:50:52,365 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-22 03:50:52,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:52,366 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-22 03:50:52,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 03:50:52,366 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-22 03:50:52,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 03:50:52,366 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:52,367 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:52,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 03:50:52,367 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:52,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:52,367 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-08-22 03:50:52,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:52,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500285052] [2020-08-22 03:50:52,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 03:50:52,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500285052] [2020-08-22 03:50:52,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:52,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 03:50:52,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162576852] [2020-08-22 03:50:52,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 03:50:52,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:52,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 03:50:52,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-22 03:50:52,842 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-22 03:50:53,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:53,077 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-22 03:50:53,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 03:50:53,078 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-22 03:50:53,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:53,079 INFO L225 Difference]: With dead ends: 58 [2020-08-22 03:50:53,079 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 03:50:53,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-22 03:50:53,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 03:50:53,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-22 03:50:53,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 03:50:53,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-22 03:50:53,087 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-22 03:50:53,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:53,087 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-22 03:50:53,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 03:50:53,088 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-22 03:50:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 03:50:53,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:53,089 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:53,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 03:50:53,089 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:53,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:53,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-08-22 03:50:53,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:53,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322058111] [2020-08-22 03:50:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 03:50:53,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322058111] [2020-08-22 03:50:53,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:53,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 03:50:53,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391026209] [2020-08-22 03:50:53,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 03:50:53,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:53,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 03:50:53,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-22 03:50:53,686 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-22 03:50:53,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:53,943 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-22 03:50:53,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 03:50:53,944 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-22 03:50:53,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:53,946 INFO L225 Difference]: With dead ends: 61 [2020-08-22 03:50:53,946 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 03:50:53,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-22 03:50:53,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 03:50:53,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-22 03:50:53,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 03:50:53,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-22 03:50:53,968 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-22 03:50:53,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:53,968 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-22 03:50:53,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 03:50:53,969 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-22 03:50:53,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 03:50:53,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:53,971 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:53,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 03:50:53,972 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:53,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:53,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-08-22 03:50:53,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:53,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774663433] [2020-08-22 03:50:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 03:50:54,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774663433] [2020-08-22 03:50:54,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:54,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 03:50:54,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492875634] [2020-08-22 03:50:54,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 03:50:54,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:54,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 03:50:54,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-22 03:50:54,629 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-22 03:50:54,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:54,908 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-22 03:50:54,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 03:50:54,908 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-22 03:50:54,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:54,910 INFO L225 Difference]: With dead ends: 64 [2020-08-22 03:50:54,910 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 03:50:54,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 03:50:54,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 03:50:54,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-22 03:50:54,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 03:50:54,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-22 03:50:54,916 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-22 03:50:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:54,917 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-22 03:50:54,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 03:50:54,917 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-22 03:50:54,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 03:50:54,919 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:54,919 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:54,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 03:50:54,920 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:54,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:54,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-08-22 03:50:54,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:54,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160319580] [2020-08-22 03:50:54,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:56,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:56,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:56,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:56,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-08-22 03:50:56,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160319580] [2020-08-22 03:50:56,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:56,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-22 03:50:56,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495667546] [2020-08-22 03:50:56,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 03:50:56,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:56,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 03:50:56,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1122, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 03:50:56,584 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 38 states. [2020-08-22 03:50:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:58,545 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2020-08-22 03:50:58,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 03:50:58,545 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 103 [2020-08-22 03:50:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:58,546 INFO L225 Difference]: With dead ends: 60 [2020-08-22 03:50:58,546 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 03:50:58,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=866, Invalid=4104, Unknown=0, NotChecked=0, Total=4970 [2020-08-22 03:50:58,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 03:50:58,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 03:50:58,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 03:50:58,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 03:50:58,551 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2020-08-22 03:50:58,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:58,551 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 03:50:58,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 03:50:58,551 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 03:50:58,552 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 03:50:58,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 03:50:58,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 03:50:58,589 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 03:50:58,590 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 03:50:58,590 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 03:50:58,590 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 03:50:58,590 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 03:50:58,590 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 03:50:58,590 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-08-22 03:50:58,590 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (<= 1 sum_~n) (= sum_~m |sum_#in~m|)) [2020-08-22 03:50:58,591 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-08-22 03:50:58,591 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-08-22 03:50:58,591 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-08-22 03:50:58,591 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-08-22 03:50:58,591 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-08-22 03:50:58,591 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-08-22 03:50:58,592 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-08-22 03:50:58,592 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-08-22 03:50:58,592 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-08-22 03:50:58,592 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= 15 main_~a~0) (<= main_~a~0 15)) [2020-08-22 03:50:58,592 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-08-22 03:50:58,592 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-08-22 03:50:58,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 03:50:58 BoogieIcfgContainer [2020-08-22 03:50:58,612 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 03:50:58,618 INFO L168 Benchmark]: Toolchain (without parser) took 12091.24 ms. Allocated memory was 140.0 MB in the beginning and 386.9 MB in the end (delta: 246.9 MB). Free memory was 103.4 MB in the beginning and 160.8 MB in the end (delta: -57.4 MB). Peak memory consumption was 189.5 MB. Max. memory is 7.1 GB. [2020-08-22 03:50:58,619 INFO L168 Benchmark]: CDTParser took 0.73 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: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 03:50:58,622 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.13 ms. Allocated memory is still 140.0 MB. Free memory was 103.2 MB in the beginning and 93.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-22 03:50:58,623 INFO L168 Benchmark]: Boogie Preprocessor took 24.97 ms. Allocated memory is still 140.0 MB. Free memory was 93.9 MB in the beginning and 92.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-22 03:50:58,624 INFO L168 Benchmark]: RCFGBuilder took 338.42 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 92.5 MB in the beginning and 172.1 MB in the end (delta: -79.5 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-22 03:50:58,624 INFO L168 Benchmark]: TraceAbstraction took 11492.38 ms. Allocated memory was 203.9 MB in the beginning and 386.9 MB in the end (delta: 183.0 MB). Free memory was 171.4 MB in the beginning and 160.8 MB in the end (delta: 10.6 MB). Peak memory consumption was 193.6 MB. Max. memory is 7.1 GB. [2020-08-22 03:50:58,631 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73 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: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 230.13 ms. Allocated memory is still 140.0 MB. Free memory was 103.2 MB in the beginning and 93.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.97 ms. Allocated memory is still 140.0 MB. Free memory was 93.9 MB in the beginning and 92.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 338.42 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 92.5 MB in the beginning and 172.1 MB in the end (delta: -79.5 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11492.38 ms. Allocated memory was 203.9 MB in the beginning and 386.9 MB in the end (delta: 183.0 MB). Free memory was 171.4 MB in the beginning and 160.8 MB in the end (delta: 10.6 MB). Peak memory consumption was 193.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.3s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 207 SDtfs, 322 SDslu, 990 SDs, 0 SdLazy, 1033 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 659 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 22 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 928 NumberOfCodeBlocks, 928 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 912 ConstructedInterpolants, 0 QuantifiedInterpolants, 213258 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 2235/3840 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...