/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=HIGHLEXORDER --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 [2020-08-21 18:56:46,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:56:46,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:56:46,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:56:46,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:56:46,067 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:56:46,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:56:46,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:56:46,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:56:46,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:56:46,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:56:46,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:56:46,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:56:46,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:56:46,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:56:46,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:56:46,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:56:46,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:56:46,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:56:46,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:56:46,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:56:46,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:56:46,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:56:46,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:56:46,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 18:56:46,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:56:46,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:56:46,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:56:46,105 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 [2020-08-21 18:56:46,133 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:56:46,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:56:46,135 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:56:46,135 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:56:46,136 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:56:46,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:56:46,136 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:56:46,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:56:46,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:56:46,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:56:46,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:56:46,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:56:46,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:56:46,137 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:56:46,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:56:46,138 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:56:46,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:56:46,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:56:46,138 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:56:46,138 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:56:46,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:56:46,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:56:46,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:56:46,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:56:46,139 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:56:46,140 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:56:46,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:56:46,140 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:56:46,140 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:56:46,140 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=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-08-21 18:56:46,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:56:46,475 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:56:46,481 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:56:46,483 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:56:46,483 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:56:46,484 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-08-21 18:56:46,566 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bdd42f8be/309a7ffd00424eee8f5ef8e2d5145fbc/FLAGebf0dd1b2 [2020-08-21 18:56:47,048 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:56:47,048 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-08-21 18:56:47,055 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bdd42f8be/309a7ffd00424eee8f5ef8e2d5145fbc/FLAGebf0dd1b2 [2020-08-21 18:56:47,424 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bdd42f8be/309a7ffd00424eee8f5ef8e2d5145fbc [2020-08-21 18:56:47,435 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:56:47,438 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:56:47,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:56:47,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:56:47,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:56:47,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:56:47" (1/1) ... [2020-08-21 18:56:47,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39032048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:47, skipping insertion in model container [2020-08-21 18:56:47,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:56:47" (1/1) ... [2020-08-21 18:56:47,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:56:47,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:56:47,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:56:47,640 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:56:47,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:56:47,673 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:56:47,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:47 WrapperNode [2020-08-21 18:56:47,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:56:47,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:56:47,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:56:47,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:56:47,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:47" (1/1) ... [2020-08-21 18:56:47,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:47" (1/1) ... [2020-08-21 18:56:47,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:47" (1/1) ... [2020-08-21 18:56:47,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:47" (1/1) ... [2020-08-21 18:56:47,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:47" (1/1) ... [2020-08-21 18:56:47,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:47" (1/1) ... [2020-08-21 18:56:47,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:47" (1/1) ... [2020-08-21 18:56:47,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:56:47,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:56:47,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:56:47,704 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:56:47,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:47" (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 [2020-08-21 18:56:47,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:56:47,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:56:47,848 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-21 18:56:47,849 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:56:47,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:56:47,849 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-21 18:56:47,849 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:56:47,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:56:47,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:56:48,023 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:56:48,024 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 18:56:48,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:56:48 BoogieIcfgContainer [2020-08-21 18:56:48,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:56:48,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:56:48,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:56:48,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:56:48,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:56:47" (1/3) ... [2020-08-21 18:56:48,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d374f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:56:48, skipping insertion in model container [2020-08-21 18:56:48,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:47" (2/3) ... [2020-08-21 18:56:48,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d374f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:56:48, skipping insertion in model container [2020-08-21 18:56:48,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:56:48" (3/3) ... [2020-08-21 18:56:48,037 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2020-08-21 18:56:48,049 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:56:48,057 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:56:48,072 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:56:48,135 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:56:48,135 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:56:48,136 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:56:48,136 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:56:48,136 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:56:48,136 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:56:48,136 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:56:48,136 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:56:48,157 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 18:56:48,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 18:56:48,166 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:48,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:48,172 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:48,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:48,179 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-21 18:56:48,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:48,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575055283] [2020-08-21 18:56:48,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:56:48,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575055283] [2020-08-21 18:56:48,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:56:48,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 18:56:48,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860664557] [2020-08-21 18:56:48,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:56:48,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:48,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:56:48,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:56:48,432 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-21 18:56:48,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:48,524 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 18:56:48,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:56:48,526 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 18:56:48,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:48,536 INFO L225 Difference]: With dead ends: 30 [2020-08-21 18:56:48,537 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 18:56:48,541 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 [2020-08-21 18:56:48,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 18:56:48,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 18:56:48,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 18:56:48,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 18:56:48,587 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 18:56:48,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:48,587 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 18:56:48,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:56:48,588 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 18:56:48,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 18:56:48,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:48,590 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:48,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:56:48,590 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:48,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:48,591 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-21 18:56:48,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:48,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030642541] [2020-08-21 18:56:48,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:48,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 18:56:48,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030642541] [2020-08-21 18:56:48,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:48,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 18:56:48,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276227631] [2020-08-21 18:56:48,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 18:56:48,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:48,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 18:56:48,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:56:48,742 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-21 18:56:48,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:48,803 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-21 18:56:48,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 18:56:48,804 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-21 18:56:48,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:48,805 INFO L225 Difference]: With dead ends: 25 [2020-08-21 18:56:48,805 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 18:56:48,807 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 [2020-08-21 18:56:48,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 18:56:48,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 18:56:48,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 18:56:48,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 18:56:48,814 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-21 18:56:48,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:48,815 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 18:56:48,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 18:56:48,815 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 18:56:48,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 18:56:48,816 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:48,816 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:48,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:56:48,817 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:48,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:48,818 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-21 18:56:48,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:48,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807277743] [2020-08-21 18:56:48,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 18:56:48,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807277743] [2020-08-21 18:56:48,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:48,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 18:56:48,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999126794] [2020-08-21 18:56:48,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 18:56:48,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:48,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 18:56:48,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:56:48,978 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-21 18:56:49,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:49,047 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-21 18:56:49,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 18:56:49,048 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-21 18:56:49,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:49,049 INFO L225 Difference]: With dead ends: 28 [2020-08-21 18:56:49,049 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 18:56:49,050 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 [2020-08-21 18:56:49,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 18:56:49,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 18:56:49,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 18:56:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-21 18:56:49,058 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-21 18:56:49,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:49,058 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-21 18:56:49,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 18:56:49,059 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-21 18:56:49,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 18:56:49,060 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:49,060 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:49,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:56:49,061 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:49,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:49,061 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-21 18:56:49,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:49,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102708927] [2020-08-21 18:56:49,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 18:56:49,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102708927] [2020-08-21 18:56:49,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:49,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 18:56:49,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543413422] [2020-08-21 18:56:49,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:56:49,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:49,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:56:49,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:56:49,319 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-21 18:56:49,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:49,423 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-21 18:56:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 18:56:49,423 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-21 18:56:49,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:49,425 INFO L225 Difference]: With dead ends: 31 [2020-08-21 18:56:49,425 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 18:56:49,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-21 18:56:49,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 18:56:49,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 18:56:49,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 18:56:49,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-21 18:56:49,432 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-21 18:56:49,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:49,433 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-21 18:56:49,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:56:49,433 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-21 18:56:49,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 18:56:49,435 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:49,435 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:49,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:56:49,436 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:49,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:49,436 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-21 18:56:49,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:49,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214304681] [2020-08-21 18:56:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-21 18:56:49,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214304681] [2020-08-21 18:56:49,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:49,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 18:56:49,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655760746] [2020-08-21 18:56:49,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 18:56:49,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:49,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 18:56:49,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:56:49,700 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-21 18:56:49,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:49,792 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-21 18:56:49,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:56:49,793 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-21 18:56:49,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:49,794 INFO L225 Difference]: With dead ends: 34 [2020-08-21 18:56:49,794 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 18:56:49,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-21 18:56:49,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 18:56:49,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 18:56:49,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 18:56:49,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-21 18:56:49,802 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-21 18:56:49,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:49,803 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-21 18:56:49,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 18:56:49,803 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-21 18:56:49,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 18:56:49,804 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:49,805 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:49,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:56:49,805 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:49,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:49,806 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-21 18:56:49,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:49,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096340996] [2020-08-21 18:56:49,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-21 18:56:49,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096340996] [2020-08-21 18:56:49,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:49,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 18:56:49,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555556963] [2020-08-21 18:56:49,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 18:56:49,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:49,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 18:56:49,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:56:49,992 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-21 18:56:50,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:50,106 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-21 18:56:50,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 18:56:50,106 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-21 18:56:50,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:50,108 INFO L225 Difference]: With dead ends: 37 [2020-08-21 18:56:50,108 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 18:56:50,109 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 [2020-08-21 18:56:50,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 18:56:50,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 18:56:50,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 18:56:50,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-21 18:56:50,115 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-21 18:56:50,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:50,116 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-21 18:56:50,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 18:56:50,116 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-21 18:56:50,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 18:56:50,118 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:50,118 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:50,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:56:50,119 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:50,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:50,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-21 18:56:50,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:50,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203607049] [2020-08-21 18:56:50,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-21 18:56:50,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203607049] [2020-08-21 18:56:50,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:50,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 18:56:50,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355451408] [2020-08-21 18:56:50,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 18:56:50,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:50,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 18:56:50,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:56:50,342 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-21 18:56:50,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:50,444 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-21 18:56:50,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 18:56:50,445 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-21 18:56:50,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:50,446 INFO L225 Difference]: With dead ends: 40 [2020-08-21 18:56:50,447 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 18:56:50,447 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 [2020-08-21 18:56:50,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 18:56:50,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-21 18:56:50,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 18:56:50,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-21 18:56:50,454 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-21 18:56:50,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:50,454 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-21 18:56:50,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 18:56:50,455 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-21 18:56:50,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 18:56:50,456 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:50,456 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:50,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:56:50,457 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:50,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:50,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-21 18:56:50,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:50,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955495474] [2020-08-21 18:56:50,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-21 18:56:50,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955495474] [2020-08-21 18:56:50,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:50,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 18:56:50,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020864835] [2020-08-21 18:56:50,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 18:56:50,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:50,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 18:56:50,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 18:56:50,692 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-21 18:56:50,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:50,807 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-21 18:56:50,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 18:56:50,807 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-21 18:56:50,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:50,809 INFO L225 Difference]: With dead ends: 43 [2020-08-21 18:56:50,809 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 18:56:50,810 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 [2020-08-21 18:56:50,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 18:56:50,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 18:56:50,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 18:56:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-21 18:56:50,816 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-21 18:56:50,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:50,817 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-21 18:56:50,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 18:56:50,817 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-21 18:56:50,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 18:56:50,818 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:50,818 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:50,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:56:50,819 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:50,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:50,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-21 18:56:50,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:50,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523160027] [2020-08-21 18:56:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-21 18:56:51,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523160027] [2020-08-21 18:56:51,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:51,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 18:56:51,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119694042] [2020-08-21 18:56:51,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 18:56:51,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:51,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 18:56:51,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 18:56:51,130 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-21 18:56:51,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:51,261 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-21 18:56:51,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 18:56:51,261 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-21 18:56:51,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:51,263 INFO L225 Difference]: With dead ends: 46 [2020-08-21 18:56:51,263 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 18:56:51,264 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 [2020-08-21 18:56:51,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 18:56:51,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 18:56:51,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 18:56:51,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-21 18:56:51,270 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-21 18:56:51,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:51,271 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-21 18:56:51,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 18:56:51,271 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-21 18:56:51,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 18:56:51,272 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:51,272 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:51,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 18:56:51,273 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:51,273 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-21 18:56:51,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:51,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230251892] [2020-08-21 18:56:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-21 18:56:51,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230251892] [2020-08-21 18:56:51,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:51,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 18:56:51,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646625137] [2020-08-21 18:56:51,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 18:56:51,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:51,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 18:56:51,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 18:56:51,604 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-21 18:56:51,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:51,775 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-21 18:56:51,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 18:56:51,775 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-21 18:56:51,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:51,777 INFO L225 Difference]: With dead ends: 49 [2020-08-21 18:56:51,777 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 18:56:51,778 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 [2020-08-21 18:56:51,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 18:56:51,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 18:56:51,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 18:56:51,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-21 18:56:51,790 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-21 18:56:51,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:51,790 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-21 18:56:51,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 18:56:51,791 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-21 18:56:51,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 18:56:51,792 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:51,793 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:51,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 18:56:51,793 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:51,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:51,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-21 18:56:51,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:51,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262771535] [2020-08-21 18:56:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-21 18:56:52,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262771535] [2020-08-21 18:56:52,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:52,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 18:56:52,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812177144] [2020-08-21 18:56:52,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 18:56:52,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:52,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 18:56:52,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-21 18:56:52,180 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-21 18:56:52,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:52,342 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-21 18:56:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 18:56:52,343 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-21 18:56:52,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:52,344 INFO L225 Difference]: With dead ends: 52 [2020-08-21 18:56:52,344 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 18:56:52,345 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 [2020-08-21 18:56:52,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 18:56:52,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-21 18:56:52,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 18:56:52,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-21 18:56:52,351 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-21 18:56:52,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:52,352 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-21 18:56:52,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 18:56:52,352 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-21 18:56:52,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 18:56:52,353 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:52,353 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:52,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 18:56:52,354 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:52,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:52,354 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-08-21 18:56:52,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:52,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053017496] [2020-08-21 18:56:52,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-21 18:56:52,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053017496] [2020-08-21 18:56:52,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:52,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 18:56:52,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830624929] [2020-08-21 18:56:52,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 18:56:52,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:52,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 18:56:52,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-21 18:56:52,839 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-21 18:56:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:53,026 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-21 18:56:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 18:56:53,027 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-21 18:56:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:53,028 INFO L225 Difference]: With dead ends: 55 [2020-08-21 18:56:53,028 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 18:56:53,029 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 [2020-08-21 18:56:53,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 18:56:53,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-21 18:56:53,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 18:56:53,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-21 18:56:53,043 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-21 18:56:53,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:53,044 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-21 18:56:53,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 18:56:53,044 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-21 18:56:53,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 18:56:53,048 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:53,048 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:53,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 18:56:53,049 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:53,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:53,049 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-08-21 18:56:53,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:53,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096975616] [2020-08-21 18:56:53,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-21 18:56:53,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096975616] [2020-08-21 18:56:53,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:53,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 18:56:53,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809194476] [2020-08-21 18:56:53,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 18:56:53,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:53,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 18:56:53,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-21 18:56:53,634 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-21 18:56:53,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:53,830 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-21 18:56:53,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 18:56:53,831 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-21 18:56:53,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:53,832 INFO L225 Difference]: With dead ends: 58 [2020-08-21 18:56:53,832 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 18:56:53,833 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 [2020-08-21 18:56:53,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 18:56:53,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-21 18:56:53,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 18:56:53,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-21 18:56:53,839 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-21 18:56:53,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:53,839 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-21 18:56:53,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 18:56:53,840 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-21 18:56:53,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 18:56:53,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:53,841 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:53,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 18:56:53,841 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:53,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:53,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-08-21 18:56:53,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:53,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130077881] [2020-08-21 18:56:53,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-21 18:56:54,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130077881] [2020-08-21 18:56:54,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:54,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 18:56:54,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636936053] [2020-08-21 18:56:54,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 18:56:54,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:54,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 18:56:54,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-21 18:56:54,366 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-21 18:56:54,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:54,572 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-21 18:56:54,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 18:56:54,572 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-21 18:56:54,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:54,573 INFO L225 Difference]: With dead ends: 61 [2020-08-21 18:56:54,573 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 18:56:54,575 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 [2020-08-21 18:56:54,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 18:56:54,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-21 18:56:54,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 18:56:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-21 18:56:54,590 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-21 18:56:54,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:54,590 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-21 18:56:54,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 18:56:54,590 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-21 18:56:54,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-21 18:56:54,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:54,593 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:54,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 18:56:54,593 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:54,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:54,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-08-21 18:56:54,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:54,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81682814] [2020-08-21 18:56:54,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-21 18:56:55,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81682814] [2020-08-21 18:56:55,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:55,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 18:56:55,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897058954] [2020-08-21 18:56:55,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 18:56:55,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:55,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 18:56:55,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-21 18:56:55,230 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-21 18:56:55,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:55,449 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-21 18:56:55,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 18:56:55,450 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-21 18:56:55,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:55,451 INFO L225 Difference]: With dead ends: 64 [2020-08-21 18:56:55,451 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 18:56:55,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 18:56:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 18:56:55,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-21 18:56:55,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-21 18:56:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-21 18:56:55,462 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-21 18:56:55,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:55,463 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-21 18:56:55,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 18:56:55,463 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-21 18:56:55,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-21 18:56:55,464 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:55,465 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:55,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 18:56:55,466 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:55,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:55,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-08-21 18:56:55,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:55,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95116027] [2020-08-21 18:56:55,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:55,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:57,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-08-21 18:56:57,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95116027] [2020-08-21 18:56:57,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:57,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-21 18:56:57,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446495854] [2020-08-21 18:56:57,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-21 18:56:57,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:57,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-21 18:56:57,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1122, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 18:56:57,217 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 38 states. [2020-08-21 18:56:58,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:58,985 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2020-08-21 18:56:58,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-21 18:56:58,985 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 103 [2020-08-21 18:56:58,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:58,986 INFO L225 Difference]: With dead ends: 60 [2020-08-21 18:56:58,986 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 18:56:58,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=866, Invalid=4104, Unknown=0, NotChecked=0, Total=4970 [2020-08-21 18:56:58,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 18:56:58,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 18:56:58,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 18:56:58,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 18:56:58,994 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2020-08-21 18:56:58,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:58,994 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 18:56:58,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-21 18:56:58,994 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 18:56:58,994 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 18:56:58,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 18:56:58,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 18:56:59,038 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 18:56:59,039 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:56:59,039 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:56:59,039 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 18:56:59,039 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 18:56:59,039 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 18:56:59,039 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-08-21 18:56:59,040 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|)) [2020-08-21 18:56:59,040 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-08-21 18:56:59,040 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-08-21 18:56:59,040 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-08-21 18:56:59,040 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-08-21 18:56:59,040 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-08-21 18:56:59,040 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-08-21 18:56:59,040 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-08-21 18:56:59,041 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-08-21 18:56:59,041 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-08-21 18:56:59,042 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= 15 main_~a~0) (<= main_~a~0 15)) [2020-08-21 18:56:59,042 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-08-21 18:56:59,042 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-08-21 18:56:59,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:56:59 BoogieIcfgContainer [2020-08-21 18:56:59,062 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:56:59,065 INFO L168 Benchmark]: Toolchain (without parser) took 11626.14 ms. Allocated memory was 137.4 MB in the beginning and 423.6 MB in the end (delta: 286.3 MB). Free memory was 99.1 MB in the beginning and 163.9 MB in the end (delta: -64.9 MB). Peak memory consumption was 221.4 MB. Max. memory is 7.1 GB. [2020-08-21 18:56:59,066 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 137.4 MB. Free memory was 117.6 MB in the beginning and 117.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 18:56:59,069 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.89 ms. Allocated memory is still 137.4 MB. Free memory was 98.9 MB in the beginning and 89.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-21 18:56:59,070 INFO L168 Benchmark]: Boogie Preprocessor took 29.42 ms. Allocated memory is still 137.4 MB. Free memory was 89.6 MB in the beginning and 88.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-21 18:56:59,071 INFO L168 Benchmark]: RCFGBuilder took 324.15 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 88.2 MB in the beginning and 168.2 MB in the end (delta: -80.0 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-21 18:56:59,071 INFO L168 Benchmark]: TraceAbstraction took 11032.63 ms. Allocated memory was 199.8 MB in the beginning and 423.6 MB in the end (delta: 223.9 MB). Free memory was 167.5 MB in the beginning and 163.9 MB in the end (delta: 3.6 MB). Peak memory consumption was 227.5 MB. Max. memory is 7.1 GB. [2020-08-21 18:56:59,080 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 137.4 MB. Free memory was 117.6 MB in the beginning and 117.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 231.89 ms. Allocated memory is still 137.4 MB. Free memory was 98.9 MB in the beginning and 89.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.42 ms. Allocated memory is still 137.4 MB. Free memory was 89.6 MB in the beginning and 88.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 324.15 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 88.2 MB in the beginning and 168.2 MB in the end (delta: -80.0 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11032.63 ms. Allocated memory was 199.8 MB in the beginning and 423.6 MB in the end (delta: 223.9 MB). Free memory was 167.5 MB in the beginning and 163.9 MB in the end (delta: 3.6 MB). Peak memory consumption was 227.5 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: 10.8s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 3.8s, 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, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 659 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 4.9s 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...