/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 interpolation-heuristic=FIRST --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/recHanoi03-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:53:23,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:53:23,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:53:23,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:53:23,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:53:23,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:53:23,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:53:23,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:53:23,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:53:23,062 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:53:23,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:53:23,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:53:23,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:53:23,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:53:23,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:53:23,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:53:23,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:53:23,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:53:23,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:53:23,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:53:23,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:53:23,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:53:23,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:53:23,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:53:23,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:53:23,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:53:23,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:53:23,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:53:23,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:53:23,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 14:53:23,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 14:53:23,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 14:53:23,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 14:53:23,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 14:53:23,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 14:53:23,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 14:53:23,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 14:53:23,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 14:53:23,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:53:23,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:53:23,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:53:23,106 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 14:53:23,151 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:53:23,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:53:23,153 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:53:23,154 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:53:23,154 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:53:23,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:53:23,154 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:53:23,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:53:23,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:53:23,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:53:23,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:53:23,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:53:23,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:53:23,157 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:53:23,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:53:23,158 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:53:23,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:53:23,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:53:23,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:53:23,159 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:53:23,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:53:23,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:53:23,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:53:23,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:53:23,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:53:23,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:53:23,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:53:23,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:53:23,161 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:53:23,161 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:53:23,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:53:23,518 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:53:23,524 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:53:23,526 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:53:23,527 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:53:23,528 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-08-21 14:53:23,593 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c35e600fd/9c5618af6d614ed68868bc80f8774f9d/FLAG4462fcb9e [2020-08-21 14:53:24,083 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:53:24,084 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-08-21 14:53:24,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c35e600fd/9c5618af6d614ed68868bc80f8774f9d/FLAG4462fcb9e [2020-08-21 14:53:24,558 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c35e600fd/9c5618af6d614ed68868bc80f8774f9d [2020-08-21 14:53:24,569 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:53:24,571 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:53:24,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:53:24,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:53:24,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:53:24,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:53:24" (1/1) ... [2020-08-21 14:53:24,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fff5522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:24, skipping insertion in model container [2020-08-21 14:53:24,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:53:24" (1/1) ... [2020-08-21 14:53:24,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:53:24,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:53:24,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:53:24,773 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:53:24,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:53:24,797 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:53:24,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:24 WrapperNode [2020-08-21 14:53:24,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:53:24,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:53:24,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:53:24,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:53:24,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:24" (1/1) ... [2020-08-21 14:53:24,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:24" (1/1) ... [2020-08-21 14:53:24,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:24" (1/1) ... [2020-08-21 14:53:24,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:24" (1/1) ... [2020-08-21 14:53:24,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:24" (1/1) ... [2020-08-21 14:53:24,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:24" (1/1) ... [2020-08-21 14:53:24,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:24" (1/1) ... [2020-08-21 14:53:24,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:53:24,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:53:24,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:53:24,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:53:24,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:24" (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 14:53:24,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:53:24,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:53:24,964 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-08-21 14:53:24,964 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:53:24,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:53:24,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:53:24,965 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-08-21 14:53:24,965 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:53:24,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:53:24,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:53:25,151 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:53:25,151 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 14:53:25,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:53:25 BoogieIcfgContainer [2020-08-21 14:53:25,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:53:25,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:53:25,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:53:25,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:53:25,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:53:24" (1/3) ... [2020-08-21 14:53:25,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@134762e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:53:25, skipping insertion in model container [2020-08-21 14:53:25,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:24" (2/3) ... [2020-08-21 14:53:25,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@134762e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:53:25, skipping insertion in model container [2020-08-21 14:53:25,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:53:25" (3/3) ... [2020-08-21 14:53:25,164 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2020-08-21 14:53:25,174 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:53:25,182 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:53:25,197 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:53:25,224 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:53:25,224 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:53:25,224 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:53:25,224 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:53:25,224 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:53:25,224 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:53:25,225 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:53:25,225 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:53:25,244 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-08-21 14:53:25,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 14:53:25,249 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:25,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:25,251 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:25,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:25,256 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2020-08-21 14:53:25,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:25,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830966971] [2020-08-21 14:53:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:53:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,502 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 14:53:25,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830966971] [2020-08-21 14:53:25,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:53:25,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:53:25,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87288340] [2020-08-21 14:53:25,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:53:25,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:25,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:53:25,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:53:25,537 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2020-08-21 14:53:25,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:25,665 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-21 14:53:25,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:53:25,667 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-21 14:53:25,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:25,679 INFO L225 Difference]: With dead ends: 33 [2020-08-21 14:53:25,679 INFO L226 Difference]: Without dead ends: 19 [2020-08-21 14:53:25,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:53:25,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-21 14:53:25,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-21 14:53:25,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-21 14:53:25,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-21 14:53:25,729 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-08-21 14:53:25,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:25,729 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-21 14:53:25,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:53:25,730 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-21 14:53:25,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 14:53:25,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:25,732 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:25,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:53:25,732 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:25,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:25,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1998834103, now seen corresponding path program 1 times [2020-08-21 14:53:25,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:25,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190441105] [2020-08-21 14:53:25,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:53:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,922 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 14:53:25,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190441105] [2020-08-21 14:53:25,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:25,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 14:53:25,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774011436] [2020-08-21 14:53:25,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:53:25,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:25,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:53:25,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:53:25,927 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 8 states. [2020-08-21 14:53:26,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:26,047 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-08-21 14:53:26,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 14:53:26,048 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-21 14:53:26,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:26,049 INFO L225 Difference]: With dead ends: 26 [2020-08-21 14:53:26,050 INFO L226 Difference]: Without dead ends: 22 [2020-08-21 14:53:26,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:53:26,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-21 14:53:26,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-21 14:53:26,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-21 14:53:26,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-08-21 14:53:26,058 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2020-08-21 14:53:26,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:26,059 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-08-21 14:53:26,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:53:26,059 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-08-21 14:53:26,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 14:53:26,061 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:26,061 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:26,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:53:26,062 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:26,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:26,062 INFO L82 PathProgramCache]: Analyzing trace with hash 293522751, now seen corresponding path program 2 times [2020-08-21 14:53:26,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:26,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953555582] [2020-08-21 14:53:26,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:53:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,310 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 14:53:26,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953555582] [2020-08-21 14:53:26,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:26,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:53:26,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48477328] [2020-08-21 14:53:26,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:53:26,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:26,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:53:26,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:53:26,314 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 10 states. [2020-08-21 14:53:26,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:26,491 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-08-21 14:53:26,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:53:26,492 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-08-21 14:53:26,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:26,493 INFO L225 Difference]: With dead ends: 29 [2020-08-21 14:53:26,493 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 14:53:26,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:53:26,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 14:53:26,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-21 14:53:26,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-21 14:53:26,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-08-21 14:53:26,501 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 26 [2020-08-21 14:53:26,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:26,502 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-08-21 14:53:26,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:53:26,502 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-08-21 14:53:26,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-21 14:53:26,503 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:26,504 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:26,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:53:26,504 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:26,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:26,505 INFO L82 PathProgramCache]: Analyzing trace with hash -547108535, now seen corresponding path program 3 times [2020-08-21 14:53:26,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:26,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266608674] [2020-08-21 14:53:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:53:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,725 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 14:53:26,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266608674] [2020-08-21 14:53:26,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:26,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 14:53:26,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740671150] [2020-08-21 14:53:26,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 14:53:26,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:26,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 14:53:26,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:53:26,728 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 12 states. [2020-08-21 14:53:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:26,935 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-08-21 14:53:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:53:26,936 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-08-21 14:53:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:26,937 INFO L225 Difference]: With dead ends: 32 [2020-08-21 14:53:26,938 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 14:53:26,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-08-21 14:53:26,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 14:53:26,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-21 14:53:26,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 14:53:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-08-21 14:53:26,945 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 32 [2020-08-21 14:53:26,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:26,946 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-08-21 14:53:26,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 14:53:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-08-21 14:53:26,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 14:53:26,947 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:26,947 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:26,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:53:26,948 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:26,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:26,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1152432193, now seen corresponding path program 4 times [2020-08-21 14:53:26,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:26,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640521720] [2020-08-21 14:53:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:53:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,200 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 14:53:27,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640521720] [2020-08-21 14:53:27,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:27,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 14:53:27,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536897341] [2020-08-21 14:53:27,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 14:53:27,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:27,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 14:53:27,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:53:27,204 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-08-21 14:53:27,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:27,512 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-08-21 14:53:27,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 14:53:27,513 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-08-21 14:53:27,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:27,514 INFO L225 Difference]: With dead ends: 35 [2020-08-21 14:53:27,515 INFO L226 Difference]: Without dead ends: 31 [2020-08-21 14:53:27,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-08-21 14:53:27,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-21 14:53:27,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-21 14:53:27,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-21 14:53:27,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-08-21 14:53:27,522 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 38 [2020-08-21 14:53:27,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:27,523 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-08-21 14:53:27,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 14:53:27,523 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-08-21 14:53:27,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-21 14:53:27,525 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:27,525 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:27,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:53:27,525 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:27,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:27,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1461718089, now seen corresponding path program 5 times [2020-08-21 14:53:27,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:27,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84019118] [2020-08-21 14:53:27,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:53:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,832 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 14:53:27,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84019118] [2020-08-21 14:53:27,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:27,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 14:53:27,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036941206] [2020-08-21 14:53:27,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 14:53:27,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:27,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 14:53:27,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-08-21 14:53:27,835 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2020-08-21 14:53:28,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:28,195 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-08-21 14:53:28,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 14:53:28,195 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-08-21 14:53:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:28,200 INFO L225 Difference]: With dead ends: 38 [2020-08-21 14:53:28,200 INFO L226 Difference]: Without dead ends: 34 [2020-08-21 14:53:28,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2020-08-21 14:53:28,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-21 14:53:28,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-08-21 14:53:28,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 14:53:28,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-08-21 14:53:28,212 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 44 [2020-08-21 14:53:28,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:28,212 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-08-21 14:53:28,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 14:53:28,213 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-08-21 14:53:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-21 14:53:28,217 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:28,217 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:28,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:53:28,218 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:28,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:28,218 INFO L82 PathProgramCache]: Analyzing trace with hash -269168065, now seen corresponding path program 6 times [2020-08-21 14:53:28,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:28,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876785034] [2020-08-21 14:53:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:53:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:28,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,545 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 14:53:28,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876785034] [2020-08-21 14:53:28,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:28,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 14:53:28,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955905950] [2020-08-21 14:53:28,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 14:53:28,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:28,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 14:53:28,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:53:28,548 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 18 states. [2020-08-21 14:53:29,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:29,002 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-08-21 14:53:29,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 14:53:29,004 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-08-21 14:53:29,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:29,006 INFO L225 Difference]: With dead ends: 41 [2020-08-21 14:53:29,006 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 14:53:29,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2020-08-21 14:53:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 14:53:29,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-08-21 14:53:29,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-21 14:53:29,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-08-21 14:53:29,020 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 50 [2020-08-21 14:53:29,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:29,022 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-08-21 14:53:29,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 14:53:29,022 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-08-21 14:53:29,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 14:53:29,023 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:29,024 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:29,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:53:29,024 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:29,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:29,025 INFO L82 PathProgramCache]: Analyzing trace with hash 585432905, now seen corresponding path program 7 times [2020-08-21 14:53:29,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:29,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737003908] [2020-08-21 14:53:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:53:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,475 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 14:53:29,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737003908] [2020-08-21 14:53:29,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:29,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 14:53:29,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993502781] [2020-08-21 14:53:29,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 14:53:29,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:29,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 14:53:29,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-21 14:53:29,479 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 20 states. [2020-08-21 14:53:30,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:30,024 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-08-21 14:53:30,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 14:53:30,025 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-08-21 14:53:30,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:30,026 INFO L225 Difference]: With dead ends: 44 [2020-08-21 14:53:30,026 INFO L226 Difference]: Without dead ends: 40 [2020-08-21 14:53:30,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=1093, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 14:53:30,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-21 14:53:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-08-21 14:53:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 14:53:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-08-21 14:53:30,035 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 56 [2020-08-21 14:53:30,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:30,035 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-08-21 14:53:30,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 14:53:30,036 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-08-21 14:53:30,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 14:53:30,037 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:30,037 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:30,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:53:30,037 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:30,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:30,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1316711615, now seen corresponding path program 8 times [2020-08-21 14:53:30,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:30,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487187116] [2020-08-21 14:53:30,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:53:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:30,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,580 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 14:53:30,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487187116] [2020-08-21 14:53:30,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:30,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 14:53:30,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373803720] [2020-08-21 14:53:30,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 14:53:30,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:30,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 14:53:30,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-08-21 14:53:30,584 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 22 states. [2020-08-21 14:53:31,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:31,291 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2020-08-21 14:53:31,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 14:53:31,292 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2020-08-21 14:53:31,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:31,293 INFO L225 Difference]: With dead ends: 47 [2020-08-21 14:53:31,293 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 14:53:31,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2020-08-21 14:53:31,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 14:53:31,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-21 14:53:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-21 14:53:31,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-08-21 14:53:31,302 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 62 [2020-08-21 14:53:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:31,302 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-08-21 14:53:31,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 14:53:31,303 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-08-21 14:53:31,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-21 14:53:31,304 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:31,304 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:31,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:53:31,304 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:31,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:31,305 INFO L82 PathProgramCache]: Analyzing trace with hash 579248713, now seen corresponding path program 9 times [2020-08-21 14:53:31,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:31,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906239429] [2020-08-21 14:53:31,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:53:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,898 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 14:53:31,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906239429] [2020-08-21 14:53:31,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:31,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 14:53:31,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645138398] [2020-08-21 14:53:31,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 14:53:31,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:31,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 14:53:31,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-08-21 14:53:31,901 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 24 states. [2020-08-21 14:53:32,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:32,689 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2020-08-21 14:53:32,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 14:53:32,690 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 68 [2020-08-21 14:53:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:32,691 INFO L225 Difference]: With dead ends: 50 [2020-08-21 14:53:32,691 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 14:53:32,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=1685, Unknown=0, NotChecked=0, Total=1806 [2020-08-21 14:53:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 14:53:32,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-08-21 14:53:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 14:53:32,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-08-21 14:53:32,699 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 68 [2020-08-21 14:53:32,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:32,699 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-08-21 14:53:32,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 14:53:32,700 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-08-21 14:53:32,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-21 14:53:32,701 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:32,701 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:32,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:53:32,701 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:32,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:32,702 INFO L82 PathProgramCache]: Analyzing trace with hash 418322239, now seen corresponding path program 10 times [2020-08-21 14:53:32,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:32,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361096658] [2020-08-21 14:53:32,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:53:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:33,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:33,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:33,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:33,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:33,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:33,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:33,430 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 14:53:33,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361096658] [2020-08-21 14:53:33,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:33,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 14:53:33,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129387073] [2020-08-21 14:53:33,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 14:53:33,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:33,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 14:53:33,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-08-21 14:53:33,433 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 26 states. [2020-08-21 14:53:34,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:34,326 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2020-08-21 14:53:34,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 14:53:34,326 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2020-08-21 14:53:34,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:34,329 INFO L225 Difference]: With dead ends: 53 [2020-08-21 14:53:34,329 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 14:53:34,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=2029, Unknown=0, NotChecked=0, Total=2162 [2020-08-21 14:53:34,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 14:53:34,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-08-21 14:53:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-21 14:53:34,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-08-21 14:53:34,341 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 74 [2020-08-21 14:53:34,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:34,343 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-08-21 14:53:34,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 14:53:34,343 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-08-21 14:53:34,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-21 14:53:34,345 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:34,345 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:34,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:53:34,345 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:34,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:34,346 INFO L82 PathProgramCache]: Analyzing trace with hash 584643913, now seen corresponding path program 11 times [2020-08-21 14:53:34,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:34,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373097700] [2020-08-21 14:53:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:34,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:53:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:35,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:35,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:35,169 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 14:53:35,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373097700] [2020-08-21 14:53:35,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:35,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 14:53:35,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419706580] [2020-08-21 14:53:35,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 14:53:35,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:35,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 14:53:35,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-08-21 14:53:35,173 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 28 states. [2020-08-21 14:53:36,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:36,242 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-08-21 14:53:36,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 14:53:36,243 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2020-08-21 14:53:36,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:36,245 INFO L225 Difference]: With dead ends: 56 [2020-08-21 14:53:36,245 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 14:53:36,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=2405, Unknown=0, NotChecked=0, Total=2550 [2020-08-21 14:53:36,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 14:53:36,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-21 14:53:36,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-21 14:53:36,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-08-21 14:53:36,253 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 80 [2020-08-21 14:53:36,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:36,254 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-08-21 14:53:36,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 14:53:36,254 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-08-21 14:53:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-21 14:53:36,255 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:36,255 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:36,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:53:36,256 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:36,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:36,256 INFO L82 PathProgramCache]: Analyzing trace with hash -195309121, now seen corresponding path program 12 times [2020-08-21 14:53:36,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:36,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817099518] [2020-08-21 14:53:36,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:53:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:37,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:37,158 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 14:53:37,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817099518] [2020-08-21 14:53:37,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:37,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-21 14:53:37,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505257991] [2020-08-21 14:53:37,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-21 14:53:37,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:37,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-21 14:53:37,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-08-21 14:53:37,160 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 30 states. [2020-08-21 14:53:38,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:38,401 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-08-21 14:53:38,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-21 14:53:38,402 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-21 14:53:38,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:38,404 INFO L225 Difference]: With dead ends: 59 [2020-08-21 14:53:38,404 INFO L226 Difference]: Without dead ends: 55 [2020-08-21 14:53:38,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=157, Invalid=2813, Unknown=0, NotChecked=0, Total=2970 [2020-08-21 14:53:38,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-21 14:53:38,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-21 14:53:38,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-21 14:53:38,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-08-21 14:53:38,411 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 86 [2020-08-21 14:53:38,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:38,412 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-08-21 14:53:38,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-21 14:53:38,412 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-08-21 14:53:38,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 14:53:38,413 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:38,413 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:38,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 14:53:38,414 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:38,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:38,414 INFO L82 PathProgramCache]: Analyzing trace with hash 498071625, now seen corresponding path program 13 times [2020-08-21 14:53:38,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:38,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728681592] [2020-08-21 14:53:38,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:53:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:38,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,484 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 14:53:39,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728681592] [2020-08-21 14:53:39,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:39,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-21 14:53:39,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983459793] [2020-08-21 14:53:39,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-21 14:53:39,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:39,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-21 14:53:39,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-08-21 14:53:39,489 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 32 states. [2020-08-21 14:53:40,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:40,950 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2020-08-21 14:53:40,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-21 14:53:40,952 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2020-08-21 14:53:40,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:40,953 INFO L225 Difference]: With dead ends: 62 [2020-08-21 14:53:40,953 INFO L226 Difference]: Without dead ends: 58 [2020-08-21 14:53:40,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=169, Invalid=3253, Unknown=0, NotChecked=0, Total=3422 [2020-08-21 14:53:40,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-21 14:53:40,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-08-21 14:53:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-21 14:53:40,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-08-21 14:53:40,960 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 92 [2020-08-21 14:53:40,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:40,961 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-08-21 14:53:40,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-21 14:53:40,961 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-08-21 14:53:40,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-21 14:53:40,962 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:40,962 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:40,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 14:53:40,962 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:40,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:40,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1462920129, now seen corresponding path program 14 times [2020-08-21 14:53:40,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:40,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857739612] [2020-08-21 14:53:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:53:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:42,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:42,285 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 14:53:42,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857739612] [2020-08-21 14:53:42,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:42,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-21 14:53:42,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025192332] [2020-08-21 14:53:42,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-21 14:53:42,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:42,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-21 14:53:42,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 14:53:42,289 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 34 states. [2020-08-21 14:53:43,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:43,911 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2020-08-21 14:53:43,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-21 14:53:43,912 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2020-08-21 14:53:43,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:43,913 INFO L225 Difference]: With dead ends: 65 [2020-08-21 14:53:43,913 INFO L226 Difference]: Without dead ends: 61 [2020-08-21 14:53:43,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=181, Invalid=3725, Unknown=0, NotChecked=0, Total=3906 [2020-08-21 14:53:43,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-21 14:53:43,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-08-21 14:53:43,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-21 14:53:43,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-08-21 14:53:43,929 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 98 [2020-08-21 14:53:43,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:43,931 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-08-21 14:53:43,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-21 14:53:43,931 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-08-21 14:53:43,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-21 14:53:43,935 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:43,936 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:43,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 14:53:43,936 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:43,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:43,937 INFO L82 PathProgramCache]: Analyzing trace with hash 2044701513, now seen corresponding path program 15 times [2020-08-21 14:53:43,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:43,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023561889] [2020-08-21 14:53:43,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:43,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:43,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:53:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:44,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:45,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-21 14:53:45,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023561889] [2020-08-21 14:53:45,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:45,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-21 14:53:45,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161239377] [2020-08-21 14:53:45,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-21 14:53:45,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:45,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-21 14:53:45,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-08-21 14:53:45,268 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 36 states. [2020-08-21 14:53:47,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:47,019 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2020-08-21 14:53:47,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-21 14:53:47,020 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 104 [2020-08-21 14:53:47,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:47,022 INFO L225 Difference]: With dead ends: 68 [2020-08-21 14:53:47,022 INFO L226 Difference]: Without dead ends: 64 [2020-08-21 14:53:47,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=193, Invalid=4229, Unknown=0, NotChecked=0, Total=4422 [2020-08-21 14:53:47,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-21 14:53:47,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-08-21 14:53:47,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 14:53:47,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-08-21 14:53:47,036 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 104 [2020-08-21 14:53:47,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:47,040 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-08-21 14:53:47,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-21 14:53:47,040 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-08-21 14:53:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-21 14:53:47,044 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:47,045 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:47,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 14:53:47,045 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:47,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:47,046 INFO L82 PathProgramCache]: Analyzing trace with hash -514820417, now seen corresponding path program 16 times [2020-08-21 14:53:47,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:47,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096641462] [2020-08-21 14:53:47,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:47,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:47,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:53:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:47,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:47,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:47,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:47,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:47,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:47,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:47,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:47,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:47,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:47,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:47,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:47,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:47,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-21 14:53:48,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096641462] [2020-08-21 14:53:48,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:48,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-21 14:53:48,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571862085] [2020-08-21 14:53:48,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-21 14:53:48,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:48,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-21 14:53:48,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 14:53:48,670 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 38 states. [2020-08-21 14:53:50,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:50,634 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2020-08-21 14:53:50,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-21 14:53:50,635 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 110 [2020-08-21 14:53:50,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:50,636 INFO L225 Difference]: With dead ends: 71 [2020-08-21 14:53:50,637 INFO L226 Difference]: Without dead ends: 67 [2020-08-21 14:53:50,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=205, Invalid=4765, Unknown=0, NotChecked=0, Total=4970 [2020-08-21 14:53:50,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-21 14:53:50,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-08-21 14:53:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-21 14:53:50,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-08-21 14:53:50,645 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 110 [2020-08-21 14:53:50,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:50,645 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-08-21 14:53:50,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-21 14:53:50,645 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-08-21 14:53:50,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-21 14:53:50,646 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:50,647 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:50,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 14:53:50,647 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:50,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:50,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1262227017, now seen corresponding path program 17 times [2020-08-21 14:53:50,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:50,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991088463] [2020-08-21 14:53:50,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:50,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:50,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:53:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:50,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:50,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:50,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:50,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:52,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-21 14:53:52,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991088463] [2020-08-21 14:53:52,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:52,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-21 14:53:52,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514222682] [2020-08-21 14:53:52,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-21 14:53:52,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:52,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-21 14:53:52,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-08-21 14:53:52,325 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 40 states. [2020-08-21 14:53:54,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:54,539 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2020-08-21 14:53:54,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-21 14:53:54,540 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 116 [2020-08-21 14:53:54,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:54,541 INFO L225 Difference]: With dead ends: 74 [2020-08-21 14:53:54,541 INFO L226 Difference]: Without dead ends: 70 [2020-08-21 14:53:54,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=217, Invalid=5333, Unknown=0, NotChecked=0, Total=5550 [2020-08-21 14:53:54,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-21 14:53:54,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-21 14:53:54,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 14:53:54,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-08-21 14:53:54,548 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 116 [2020-08-21 14:53:54,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:54,549 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-08-21 14:53:54,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-21 14:53:54,549 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-08-21 14:53:54,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-21 14:53:54,550 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:54,550 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:54,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 14:53:54,551 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:54,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:54,551 INFO L82 PathProgramCache]: Analyzing trace with hash -336568001, now seen corresponding path program 18 times [2020-08-21 14:53:54,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:54,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690665863] [2020-08-21 14:53:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:53:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:55,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:55,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:55,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:55,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:55,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:55,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:55,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:55,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:55,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:55,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:55,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,197 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-21 14:53:56,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690665863] [2020-08-21 14:53:56,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:56,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-21 14:53:56,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527676295] [2020-08-21 14:53:56,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-21 14:53:56,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:56,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-21 14:53:56,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-08-21 14:53:56,200 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 42 states. [2020-08-21 14:53:58,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:58,751 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2020-08-21 14:53:58,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-21 14:53:58,752 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 122 [2020-08-21 14:53:58,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:58,754 INFO L225 Difference]: With dead ends: 77 [2020-08-21 14:53:58,754 INFO L226 Difference]: Without dead ends: 73 [2020-08-21 14:53:58,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=229, Invalid=5933, Unknown=0, NotChecked=0, Total=6162 [2020-08-21 14:53:58,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-21 14:53:58,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-08-21 14:53:58,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-21 14:53:58,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-08-21 14:53:58,762 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 122 [2020-08-21 14:53:58,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:58,762 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-08-21 14:53:58,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-21 14:53:58,762 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-08-21 14:53:58,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-21 14:53:58,764 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:58,764 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:58,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 14:53:58,764 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:58,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:58,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1835458231, now seen corresponding path program 19 times [2020-08-21 14:53:58,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:58,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424630452] [2020-08-21 14:53:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:58,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:58,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:53:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:58,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:53:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:00,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:00,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:00,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:00,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:00,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:00,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-21 14:54:00,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424630452] [2020-08-21 14:54:00,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:54:00,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-21 14:54:00,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824546761] [2020-08-21 14:54:00,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-21 14:54:00,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:54:00,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-21 14:54:00,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-08-21 14:54:00,726 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 44 states. [2020-08-21 14:54:03,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:54:03,547 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2020-08-21 14:54:03,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-21 14:54:03,548 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 128 [2020-08-21 14:54:03,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:54:03,549 INFO L225 Difference]: With dead ends: 80 [2020-08-21 14:54:03,549 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 14:54:03,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=241, Invalid=6565, Unknown=0, NotChecked=0, Total=6806 [2020-08-21 14:54:03,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 14:54:03,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-08-21 14:54:03,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 14:54:03,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-08-21 14:54:03,557 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 128 [2020-08-21 14:54:03,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:54:03,557 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-08-21 14:54:03,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-21 14:54:03,557 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-08-21 14:54:03,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-21 14:54:03,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:54:03,559 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:54:03,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 14:54:03,559 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:54:03,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:54:03,559 INFO L82 PathProgramCache]: Analyzing trace with hash 2042190783, now seen corresponding path program 20 times [2020-08-21 14:54:03,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:54:03,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433381027] [2020-08-21 14:54:03,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:54:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:54:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:54:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:04,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:04,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:04,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:04,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:04,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:04,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:04,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:04,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:04,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:04,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:04,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:05,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:05,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:05,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-21 14:54:05,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433381027] [2020-08-21 14:54:05,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:54:05,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-21 14:54:05,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760668226] [2020-08-21 14:54:05,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-21 14:54:05,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:54:05,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-21 14:54:05,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-08-21 14:54:05,524 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 46 states. [2020-08-21 14:54:08,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:54:08,581 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2020-08-21 14:54:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-21 14:54:08,585 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 134 [2020-08-21 14:54:08,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:54:08,586 INFO L225 Difference]: With dead ends: 83 [2020-08-21 14:54:08,586 INFO L226 Difference]: Without dead ends: 79 [2020-08-21 14:54:08,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=253, Invalid=7229, Unknown=0, NotChecked=0, Total=7482 [2020-08-21 14:54:08,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-21 14:54:08,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-08-21 14:54:08,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 14:54:08,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-08-21 14:54:08,592 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 134 [2020-08-21 14:54:08,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:54:08,592 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-08-21 14:54:08,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-21 14:54:08,593 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-08-21 14:54:08,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-08-21 14:54:08,594 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:54:08,594 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:54:08,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 14:54:08,595 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:54:08,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:54:08,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2110448713, now seen corresponding path program 21 times [2020-08-21 14:54:08,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:54:08,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029397443] [2020-08-21 14:54:08,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:54:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:08,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:54:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:08,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:54:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:08,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:08,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:08,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:08,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:08,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:08,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:09,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:09,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:09,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:09,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:09,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:09,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:09,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:09,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:09,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:09,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:09,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:10,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:10,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:10,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:10,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:10,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:10,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-21 14:54:10,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029397443] [2020-08-21 14:54:10,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:54:10,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-21 14:54:10,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788502216] [2020-08-21 14:54:10,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-21 14:54:10,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:54:10,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-21 14:54:10,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-08-21 14:54:10,791 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 48 states. [2020-08-21 14:54:14,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:54:14,368 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2020-08-21 14:54:14,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-08-21 14:54:14,371 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 140 [2020-08-21 14:54:14,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:54:14,372 INFO L225 Difference]: With dead ends: 86 [2020-08-21 14:54:14,373 INFO L226 Difference]: Without dead ends: 82 [2020-08-21 14:54:14,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=265, Invalid=7925, Unknown=0, NotChecked=0, Total=8190 [2020-08-21 14:54:14,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-21 14:54:14,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-08-21 14:54:14,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-21 14:54:14,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-08-21 14:54:14,379 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 140 [2020-08-21 14:54:14,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:54:14,379 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-08-21 14:54:14,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-21 14:54:14,379 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-08-21 14:54:14,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 14:54:14,381 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:54:14,381 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:54:14,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 14:54:14,381 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:54:14,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:54:14,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1589077567, now seen corresponding path program 22 times [2020-08-21 14:54:14,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:54:14,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919731617] [2020-08-21 14:54:14,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:54:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:14,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:54:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:14,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:54:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:14,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:14,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:14,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:14,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:14,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:14,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:14,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:14,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:15,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:15,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:15,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:15,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:15,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:15,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:15,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:15,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:15,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:16,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:16,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:16,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:16,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:16,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:16,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-08-21 14:54:16,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919731617] [2020-08-21 14:54:16,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:54:16,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-08-21 14:54:16,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598090103] [2020-08-21 14:54:16,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-21 14:54:16,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:54:16,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-21 14:54:16,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2020-08-21 14:54:16,793 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 50 states. [2020-08-21 14:54:20,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:54:20,765 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2020-08-21 14:54:20,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-08-21 14:54:20,766 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 146 [2020-08-21 14:54:20,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:54:20,767 INFO L225 Difference]: With dead ends: 89 [2020-08-21 14:54:20,767 INFO L226 Difference]: Without dead ends: 85 [2020-08-21 14:54:20,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=277, Invalid=8653, Unknown=0, NotChecked=0, Total=8930 [2020-08-21 14:54:20,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-21 14:54:20,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-08-21 14:54:20,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-21 14:54:20,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-08-21 14:54:20,774 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 146 [2020-08-21 14:54:20,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:54:20,774 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-08-21 14:54:20,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-21 14:54:20,775 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-08-21 14:54:20,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-21 14:54:20,777 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:54:20,777 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:54:20,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 14:54:20,777 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:54:20,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:54:20,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1482336439, now seen corresponding path program 23 times [2020-08-21 14:54:20,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:54:20,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325904913] [2020-08-21 14:54:20,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:54:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:20,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:54:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:20,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:54:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:20,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:20,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:54:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat