/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:58:10,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:58:10,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:58:11,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:58:11,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:58:11,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:58:11,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:58:11,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:58:11,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:58:11,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:58:11,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:58:11,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:58:11,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:58:11,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:58:11,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:58:11,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:58:11,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:58:11,044 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:58:11,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:58:11,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:58:11,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:58:11,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:58:11,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:58:11,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:58:11,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 22:58:11,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 22:58:11,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 22:58:11,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 22:58:11,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 22:58:11,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 22:58:11,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 22:58:11,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 22:58:11,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 22:58:11,086 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 22:58:11,087 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 22:58:11,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 22:58:11,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 22:58:11,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 22:58:11,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:58:11,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:58:11,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:58:11,091 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 22:58:11,112 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:58:11,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:58:11,114 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:58:11,114 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:58:11,114 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:58:11,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:58:11,115 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:58:11,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:58:11,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:58:11,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:58:11,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:58:11,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:58:11,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:58:11,116 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:58:11,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:58:11,116 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:58:11,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:58:11,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:58:11,117 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:58:11,117 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:58:11,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:58:11,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:58:11,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:58:11,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:58:11,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:58:11,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:58:11,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:58:11,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:58:11,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:58:11,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-08-21 22:58:11,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:58:11,463 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:58:11,467 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:58:11,468 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:58:11,469 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:58:11,470 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-08-21 22:58:11,551 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f2418df0/021925d6334e44fc94e0a2c418df6621/FLAG1e02bc01e [2020-08-21 22:58:12,008 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:58:12,009 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-08-21 22:58:12,016 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f2418df0/021925d6334e44fc94e0a2c418df6621/FLAG1e02bc01e [2020-08-21 22:58:12,440 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f2418df0/021925d6334e44fc94e0a2c418df6621 [2020-08-21 22:58:12,450 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:58:12,452 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:58:12,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:58:12,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:58:12,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:58:12,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:58:12" (1/1) ... [2020-08-21 22:58:12,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aa43bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:12, skipping insertion in model container [2020-08-21 22:58:12,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:58:12" (1/1) ... [2020-08-21 22:58:12,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:58:12,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:58:12,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:58:12,675 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:58:12,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:58:12,704 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:58:12,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:12 WrapperNode [2020-08-21 22:58:12,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:58:12,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:58:12,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:58:12,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:58:12,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:12" (1/1) ... [2020-08-21 22:58:12,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:12" (1/1) ... [2020-08-21 22:58:12,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:12" (1/1) ... [2020-08-21 22:58:12,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:12" (1/1) ... [2020-08-21 22:58:12,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:12" (1/1) ... [2020-08-21 22:58:12,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:12" (1/1) ... [2020-08-21 22:58:12,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:12" (1/1) ... [2020-08-21 22:58:12,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:58:12,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:58:12,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:58:12,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:58:12,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:12" (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 22:58:12,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:58:12,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:58:12,892 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-21 22:58:12,893 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-21 22:58:12,894 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:58:12,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:58:12,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:58:12,895 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-21 22:58:12,895 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-21 22:58:12,896 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:58:12,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:58:12,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:58:13,101 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:58:13,101 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 22:58:13,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:58:13 BoogieIcfgContainer [2020-08-21 22:58:13,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:58:13,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:58:13,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:58:13,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:58:13,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:58:12" (1/3) ... [2020-08-21 22:58:13,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639af83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:58:13, skipping insertion in model container [2020-08-21 22:58:13,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:12" (2/3) ... [2020-08-21 22:58:13,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639af83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:58:13, skipping insertion in model container [2020-08-21 22:58:13,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:58:13" (3/3) ... [2020-08-21 22:58:13,115 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2020-08-21 22:58:13,127 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:58:13,136 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:58:13,152 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:58:13,189 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:58:13,189 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:58:13,189 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:58:13,189 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:58:13,189 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:58:13,190 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:58:13,190 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:58:13,190 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:58:13,217 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-21 22:58:13,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 22:58:13,229 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:13,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:13,231 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:13,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:13,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-21 22:58:13,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:13,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877272289] [2020-08-21 22:58:13,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:13,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:13,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:13,482 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 22:58:13,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877272289] [2020-08-21 22:58:13,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:58:13,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 22:58:13,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419775534] [2020-08-21 22:58:13,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:58:13,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:13,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:58:13,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:58:13,508 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-21 22:58:13,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:13,633 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-21 22:58:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:58:13,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 22:58:13,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:13,647 INFO L225 Difference]: With dead ends: 44 [2020-08-21 22:58:13,647 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 22:58:13,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:58:13,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 22:58:13,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 22:58:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 22:58:13,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-21 22:58:13,701 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-21 22:58:13,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:13,702 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-21 22:58:13,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:58:13,702 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-21 22:58:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 22:58:13,704 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:13,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:13,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:58:13,706 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:13,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:13,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-21 22:58:13,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:13,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749603235] [2020-08-21 22:58:13,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:13,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:13,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:13,778 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 22:58:13,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749603235] [2020-08-21 22:58:13,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:58:13,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 22:58:13,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338055898] [2020-08-21 22:58:13,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:58:13,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:13,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:58:13,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:58:13,785 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-21 22:58:13,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:13,865 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-21 22:58:13,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:58:13,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-21 22:58:13,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:13,868 INFO L225 Difference]: With dead ends: 36 [2020-08-21 22:58:13,869 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 22:58:13,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:58:13,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 22:58:13,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 22:58:13,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 22:58:13,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-21 22:58:13,880 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-21 22:58:13,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:13,880 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-21 22:58:13,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:58:13,881 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-21 22:58:13,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 22:58:13,883 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:13,883 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:13,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:58:13,884 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:13,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:13,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-21 22:58:13,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:13,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902565173] [2020-08-21 22:58:13,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:13,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:13,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:13,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:58:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 22:58:14,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902565173] [2020-08-21 22:58:14,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:14,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 22:58:14,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801016042] [2020-08-21 22:58:14,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:58:14,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:14,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:58:14,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:58:14,019 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-21 22:58:14,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:14,123 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-21 22:58:14,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 22:58:14,124 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-21 22:58:14,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:14,126 INFO L225 Difference]: With dead ends: 58 [2020-08-21 22:58:14,126 INFO L226 Difference]: Without dead ends: 34 [2020-08-21 22:58:14,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:58:14,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-21 22:58:14,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-21 22:58:14,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 22:58:14,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-21 22:58:14,138 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-21 22:58:14,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:14,138 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-21 22:58:14,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:58:14,139 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-21 22:58:14,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 22:58:14,141 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:14,141 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:14,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:58:14,142 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:14,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:14,142 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-21 22:58:14,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:14,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876101042] [2020-08-21 22:58:14,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 22:58:14,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876101042] [2020-08-21 22:58:14,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:14,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 22:58:14,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229738751] [2020-08-21 22:58:14,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:58:14,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:14,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:58:14,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:58:14,317 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-21 22:58:14,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:14,498 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-21 22:58:14,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 22:58:14,499 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-21 22:58:14,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:14,503 INFO L225 Difference]: With dead ends: 54 [2020-08-21 22:58:14,503 INFO L226 Difference]: Without dead ends: 50 [2020-08-21 22:58:14,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:58:14,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-21 22:58:14,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-21 22:58:14,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 22:58:14,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-21 22:58:14,525 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-21 22:58:14,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:14,525 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-21 22:58:14,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:58:14,525 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-21 22:58:14,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-21 22:58:14,527 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:14,528 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:14,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:58:14,528 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:14,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:14,529 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-21 22:58:14,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:14,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492511526] [2020-08-21 22:58:14,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:58:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 22:58:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 22:58:14,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492511526] [2020-08-21 22:58:14,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:14,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 22:58:14,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182430021] [2020-08-21 22:58:14,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:58:14,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:14,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:58:14,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:58:14,634 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-21 22:58:14,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:14,703 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-21 22:58:14,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 22:58:14,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-21 22:58:14,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:14,706 INFO L225 Difference]: With dead ends: 94 [2020-08-21 22:58:14,706 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 22:58:14,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:58:14,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 22:58:14,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-21 22:58:14,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-21 22:58:14,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-21 22:58:14,720 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-21 22:58:14,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:14,720 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-21 22:58:14,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:58:14,721 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-21 22:58:14,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 22:58:14,723 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:14,723 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:14,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:58:14,724 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:14,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:14,724 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-21 22:58:14,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:14,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63777148] [2020-08-21 22:58:14,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-21 22:58:14,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63777148] [2020-08-21 22:58:14,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:14,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 22:58:14,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871251882] [2020-08-21 22:58:14,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:58:14,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:14,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:58:14,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:58:14,916 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-21 22:58:15,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:15,026 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-21 22:58:15,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:58:15,026 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-21 22:58:15,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:15,028 INFO L225 Difference]: With dead ends: 103 [2020-08-21 22:58:15,029 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 22:58:15,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:58:15,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 22:58:15,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-21 22:58:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 22:58:15,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-21 22:58:15,042 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-21 22:58:15,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:15,043 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-21 22:58:15,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:58:15,043 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-21 22:58:15,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 22:58:15,045 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:15,046 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:15,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:58:15,046 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:15,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:15,047 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-21 22:58:15,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:15,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804440595] [2020-08-21 22:58:15,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 22:58:15,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804440595] [2020-08-21 22:58:15,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:15,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 22:58:15,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719951785] [2020-08-21 22:58:15,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:58:15,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:15,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:58:15,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:58:15,230 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-21 22:58:15,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:15,466 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-21 22:58:15,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:58:15,467 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-21 22:58:15,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:15,469 INFO L225 Difference]: With dead ends: 86 [2020-08-21 22:58:15,469 INFO L226 Difference]: Without dead ends: 82 [2020-08-21 22:58:15,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:58:15,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-21 22:58:15,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-21 22:58:15,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 22:58:15,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-21 22:58:15,488 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-21 22:58:15,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:15,489 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-21 22:58:15,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:58:15,489 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-21 22:58:15,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 22:58:15,493 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:15,493 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:15,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:58:15,494 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:15,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:15,494 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-21 22:58:15,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:15,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764192976] [2020-08-21 22:58:15,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 22:58:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-21 22:58:15,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764192976] [2020-08-21 22:58:15,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:15,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 22:58:15,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131879160] [2020-08-21 22:58:15,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:58:15,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:15,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:58:15,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:58:15,631 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-21 22:58:15,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:15,762 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-21 22:58:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 22:58:15,763 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-21 22:58:15,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:15,765 INFO L225 Difference]: With dead ends: 167 [2020-08-21 22:58:15,765 INFO L226 Difference]: Without dead ends: 94 [2020-08-21 22:58:15,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:58:15,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-21 22:58:15,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-21 22:58:15,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 22:58:15,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-21 22:58:15,784 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-21 22:58:15,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:15,785 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-21 22:58:15,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:58:15,785 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-21 22:58:15,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 22:58:15,788 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:15,788 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:15,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 22:58:15,789 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:15,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:15,789 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-21 22:58:15,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:15,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669183652] [2020-08-21 22:58:15,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 22:58:15,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669183652] [2020-08-21 22:58:15,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:15,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:58:15,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825746942] [2020-08-21 22:58:15,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:58:15,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:15,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:58:15,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:58:15,991 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-21 22:58:16,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:16,232 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-21 22:58:16,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 22:58:16,233 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-21 22:58:16,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:16,235 INFO L225 Difference]: With dead ends: 188 [2020-08-21 22:58:16,236 INFO L226 Difference]: Without dead ends: 109 [2020-08-21 22:58:16,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:58:16,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-21 22:58:16,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-21 22:58:16,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-21 22:58:16,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-21 22:58:16,260 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-21 22:58:16,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:16,260 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-21 22:58:16,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:58:16,260 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-21 22:58:16,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-21 22:58:16,263 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:16,263 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:16,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 22:58:16,263 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:16,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:16,264 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-21 22:58:16,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:16,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849044782] [2020-08-21 22:58:16,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-21 22:58:16,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849044782] [2020-08-21 22:58:16,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:16,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 22:58:16,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670418478] [2020-08-21 22:58:16,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 22:58:16,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:16,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 22:58:16,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:58:16,513 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-21 22:58:16,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:16,924 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-21 22:58:16,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 22:58:16,925 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-21 22:58:16,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:16,930 INFO L225 Difference]: With dead ends: 199 [2020-08-21 22:58:16,930 INFO L226 Difference]: Without dead ends: 86 [2020-08-21 22:58:16,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-08-21 22:58:16,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-21 22:58:16,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2020-08-21 22:58:16,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-21 22:58:16,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2020-08-21 22:58:16,951 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 82 [2020-08-21 22:58:16,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:16,952 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2020-08-21 22:58:16,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 22:58:16,952 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2020-08-21 22:58:16,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-21 22:58:16,954 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:16,954 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:16,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 22:58:16,955 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:16,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:16,955 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 2 times [2020-08-21 22:58:16,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:16,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924253949] [2020-08-21 22:58:16,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 22:58:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-08-21 22:58:17,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924253949] [2020-08-21 22:58:17,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:17,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:58:17,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927110071] [2020-08-21 22:58:17,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:58:17,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:17,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:58:17,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:58:17,180 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand 10 states. [2020-08-21 22:58:17,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:17,373 INFO L93 Difference]: Finished difference Result 142 states and 204 transitions. [2020-08-21 22:58:17,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 22:58:17,374 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2020-08-21 22:58:17,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:17,376 INFO L225 Difference]: With dead ends: 142 [2020-08-21 22:58:17,376 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 22:58:17,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:58:17,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 22:58:17,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-21 22:58:17,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 22:58:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2020-08-21 22:58:17,386 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 110 [2020-08-21 22:58:17,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:17,387 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2020-08-21 22:58:17,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:58:17,387 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2020-08-21 22:58:17,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-21 22:58:17,389 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:17,389 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:17,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 22:58:17,390 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:17,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:17,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1263382818, now seen corresponding path program 3 times [2020-08-21 22:58:17,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:17,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102483134] [2020-08-21 22:58:17,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 22:58:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 22:58:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 22:58:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 98 proven. 322 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2020-08-21 22:58:17,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102483134] [2020-08-21 22:58:17,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:17,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 22:58:17,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321537419] [2020-08-21 22:58:17,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 22:58:17,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:17,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 22:58:17,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:58:17,832 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 12 states. [2020-08-21 22:58:18,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:18,183 INFO L93 Difference]: Finished difference Result 178 states and 263 transitions. [2020-08-21 22:58:18,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 22:58:18,184 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 192 [2020-08-21 22:58:18,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:18,186 INFO L225 Difference]: With dead ends: 178 [2020-08-21 22:58:18,186 INFO L226 Difference]: Without dead ends: 109 [2020-08-21 22:58:18,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-08-21 22:58:18,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-21 22:58:18,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2020-08-21 22:58:18,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-21 22:58:18,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2020-08-21 22:58:18,202 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 192 [2020-08-21 22:58:18,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:18,204 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2020-08-21 22:58:18,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 22:58:18,204 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2020-08-21 22:58:18,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-21 22:58:18,208 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:18,209 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:18,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 22:58:18,209 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:18,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:18,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1677699577, now seen corresponding path program 1 times [2020-08-21 22:58:18,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:18,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950919198] [2020-08-21 22:58:18,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:18,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 22:58:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 77 proven. 26 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-08-21 22:58:18,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950919198] [2020-08-21 22:58:18,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:18,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 22:58:18,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229210162] [2020-08-21 22:58:18,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 22:58:18,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:18,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 22:58:18,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:58:18,457 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand 11 states. [2020-08-21 22:58:18,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:18,743 INFO L93 Difference]: Finished difference Result 172 states and 244 transitions. [2020-08-21 22:58:18,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 22:58:18,745 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 96 [2020-08-21 22:58:18,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:18,747 INFO L225 Difference]: With dead ends: 172 [2020-08-21 22:58:18,747 INFO L226 Difference]: Without dead ends: 94 [2020-08-21 22:58:18,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-21 22:58:18,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-21 22:58:18,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-08-21 22:58:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-21 22:58:18,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2020-08-21 22:58:18,766 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 126 transitions. Word has length 96 [2020-08-21 22:58:18,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:18,768 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 126 transitions. [2020-08-21 22:58:18,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 22:58:18,768 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 126 transitions. [2020-08-21 22:58:18,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-21 22:58:18,772 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:18,772 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:18,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 22:58:18,773 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:18,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:18,773 INFO L82 PathProgramCache]: Analyzing trace with hash 265701462, now seen corresponding path program 2 times [2020-08-21 22:58:18,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:18,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61490869] [2020-08-21 22:58:18,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 22:58:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 56 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-08-21 22:58:19,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61490869] [2020-08-21 22:58:19,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:19,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 22:58:19,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814288853] [2020-08-21 22:58:19,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 22:58:19,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:19,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 22:58:19,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:58:19,063 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand 12 states. [2020-08-21 22:58:19,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:19,398 INFO L93 Difference]: Finished difference Result 185 states and 262 transitions. [2020-08-21 22:58:19,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 22:58:19,399 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 110 [2020-08-21 22:58:19,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:19,401 INFO L225 Difference]: With dead ends: 185 [2020-08-21 22:58:19,401 INFO L226 Difference]: Without dead ends: 104 [2020-08-21 22:58:19,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-08-21 22:58:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-21 22:58:19,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2020-08-21 22:58:19,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-21 22:58:19,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 120 transitions. [2020-08-21 22:58:19,413 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 120 transitions. Word has length 110 [2020-08-21 22:58:19,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:19,413 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 120 transitions. [2020-08-21 22:58:19,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 22:58:19,414 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 120 transitions. [2020-08-21 22:58:19,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 22:58:19,415 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:19,415 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:19,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 22:58:19,416 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:19,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:19,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 3 times [2020-08-21 22:58:19,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:19,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702427950] [2020-08-21 22:58:19,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 22:58:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-08-21 22:58:20,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702427950] [2020-08-21 22:58:20,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:20,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 22:58:20,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821372561] [2020-08-21 22:58:20,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 22:58:20,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:20,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 22:58:20,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-08-21 22:58:20,038 INFO L87 Difference]: Start difference. First operand 91 states and 120 transitions. Second operand 22 states. [2020-08-21 22:58:20,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:20,420 INFO L93 Difference]: Finished difference Result 105 states and 141 transitions. [2020-08-21 22:58:20,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 22:58:20,421 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2020-08-21 22:58:20,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:20,422 INFO L225 Difference]: With dead ends: 105 [2020-08-21 22:58:20,422 INFO L226 Difference]: Without dead ends: 101 [2020-08-21 22:58:20,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-08-21 22:58:20,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-21 22:58:20,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2020-08-21 22:58:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-21 22:58:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 135 transitions. [2020-08-21 22:58:20,431 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 135 transitions. Word has length 109 [2020-08-21 22:58:20,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:20,431 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 135 transitions. [2020-08-21 22:58:20,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 22:58:20,432 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 135 transitions. [2020-08-21 22:58:20,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 22:58:20,434 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:20,434 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:20,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 22:58:20,434 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:20,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:20,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1650675485, now seen corresponding path program 4 times [2020-08-21 22:58:20,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:20,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097319358] [2020-08-21 22:58:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 22:58:20,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 94 proven. 190 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-21 22:58:20,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097319358] [2020-08-21 22:58:20,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:20,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 22:58:20,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055364308] [2020-08-21 22:58:20,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 22:58:20,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:20,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 22:58:20,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:58:20,784 INFO L87 Difference]: Start difference. First operand 99 states and 135 transitions. Second operand 14 states. [2020-08-21 22:58:21,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:21,336 INFO L93 Difference]: Finished difference Result 208 states and 318 transitions. [2020-08-21 22:58:21,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 22:58:21,337 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 150 [2020-08-21 22:58:21,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:21,340 INFO L225 Difference]: With dead ends: 208 [2020-08-21 22:58:21,340 INFO L226 Difference]: Without dead ends: 113 [2020-08-21 22:58:21,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2020-08-21 22:58:21,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-08-21 22:58:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2020-08-21 22:58:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-21 22:58:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2020-08-21 22:58:21,358 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 150 [2020-08-21 22:58:21,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:21,358 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2020-08-21 22:58:21,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 22:58:21,359 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2020-08-21 22:58:21,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-08-21 22:58:21,363 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:21,364 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 11, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:21,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 22:58:21,364 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:21,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:21,365 INFO L82 PathProgramCache]: Analyzing trace with hash 215516676, now seen corresponding path program 5 times [2020-08-21 22:58:21,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:21,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714689269] [2020-08-21 22:58:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 22:58:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 22:58:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 22:58:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 119 proven. 187 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2020-08-21 22:58:21,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714689269] [2020-08-21 22:58:21,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:21,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 22:58:21,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769364670] [2020-08-21 22:58:21,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 22:58:21,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:21,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 22:58:21,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:58:21,744 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand 11 states. [2020-08-21 22:58:22,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:22,036 INFO L93 Difference]: Finished difference Result 199 states and 275 transitions. [2020-08-21 22:58:22,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 22:58:22,036 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 190 [2020-08-21 22:58:22,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:22,038 INFO L225 Difference]: With dead ends: 199 [2020-08-21 22:58:22,038 INFO L226 Difference]: Without dead ends: 108 [2020-08-21 22:58:22,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-21 22:58:22,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-08-21 22:58:22,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2020-08-21 22:58:22,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-21 22:58:22,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 137 transitions. [2020-08-21 22:58:22,051 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 137 transitions. Word has length 190 [2020-08-21 22:58:22,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:22,051 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 137 transitions. [2020-08-21 22:58:22,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 22:58:22,052 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 137 transitions. [2020-08-21 22:58:22,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 22:58:22,053 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:22,053 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:22,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 22:58:22,054 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:22,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:22,054 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 6 times [2020-08-21 22:58:22,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:22,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562955370] [2020-08-21 22:58:22,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 22:58:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 22:58:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 66 proven. 156 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2020-08-21 22:58:22,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562955370] [2020-08-21 22:58:22,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:22,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 22:58:22,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931861854] [2020-08-21 22:58:22,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 22:58:22,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:22,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 22:58:22,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:58:22,426 INFO L87 Difference]: Start difference. First operand 105 states and 137 transitions. Second operand 11 states. [2020-08-21 22:58:22,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:22,682 INFO L93 Difference]: Finished difference Result 123 states and 161 transitions. [2020-08-21 22:58:22,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 22:58:22,683 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 150 [2020-08-21 22:58:22,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:22,684 INFO L225 Difference]: With dead ends: 123 [2020-08-21 22:58:22,684 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 22:58:22,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-08-21 22:58:22,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 22:58:22,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 22:58:22,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 22:58:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 22:58:22,686 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 150 [2020-08-21 22:58:22,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:22,686 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 22:58:22,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 22:58:22,687 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 22:58:22,687 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 22:58:22,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 22:58:22,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 22:58:23,511 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 23 [2020-08-21 22:58:23,616 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 6 [2020-08-21 22:58:23,943 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 24 [2020-08-21 22:58:23,948 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 22:58:23,948 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:58:23,948 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:58:23,948 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 22:58:23,948 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 22:58:23,948 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 22:58:23,949 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-08-21 22:58:23,949 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-08-21 22:58:23,949 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-08-21 22:58:23,949 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-08-21 22:58:23,949 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-21 22:58:23,949 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-21 22:58:23,951 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-08-21 22:58:23,952 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-08-21 22:58:23,952 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-08-21 22:58:23,952 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-08-21 22:58:23,954 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-08-21 22:58:23,954 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-21 22:58:23,954 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (= fibo2_~n |fibo2_#in~n|)) (.cse1 (<= |fibo2_#in~n| 2))) (and (or (and .cse0 (<= 5 fibo2_~n)) (and (<= 4 fibo2_~n) (<= 2 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 2) .cse0) .cse1) (or (and (<= |fibo2_#t~ret2| 1) .cse0 (<= 1 |fibo2_#t~ret2|) (<= 2 |fibo2_#in~n|)) (not .cse1)))) [2020-08-21 22:58:23,954 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-08-21 22:58:23,954 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-08-21 22:58:23,955 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-08-21 22:58:23,955 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-08-21 22:58:23,955 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-08-21 22:58:23,955 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-08-21 22:58:23,955 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (= fibo1_~n |fibo1_#in~n|)) [2020-08-21 22:58:23,955 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-08-21 22:58:23,955 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (or (and (<= |fibo1_#t~ret0| 1) (<= 1 |fibo1_#t~ret0|)) (<= 4 |fibo1_#in~n|)) (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 3 |fibo1_#t~ret0|) .cse0 (<= |fibo1_#t~ret0| 3)) (and .cse0 (<= 6 |fibo1_#in~n|)) (and (<= fibo1_~n 4) .cse0)))) [2020-08-21 22:58:23,956 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-08-21 22:58:23,957 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-08-21 22:58:23,957 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-08-21 22:58:23,957 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-08-21 22:58:23,957 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-08-21 22:58:23,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:58:23 BoogieIcfgContainer [2020-08-21 22:58:23,965 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:58:23,967 INFO L168 Benchmark]: Toolchain (without parser) took 11515.70 ms. Allocated memory was 140.5 MB in the beginning and 411.6 MB in the end (delta: 271.1 MB). Free memory was 103.3 MB in the beginning and 374.1 MB in the end (delta: -270.7 MB). Peak memory consumption was 245.7 MB. Max. memory is 7.1 GB. [2020-08-21 22:58:23,967 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 22:58:23,968 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.25 ms. Allocated memory is still 140.5 MB. Free memory was 103.1 MB in the beginning and 93.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-21 22:58:23,969 INFO L168 Benchmark]: Boogie Preprocessor took 118.33 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.5 MB in the beginning and 181.7 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-21 22:58:23,969 INFO L168 Benchmark]: RCFGBuilder took 282.08 ms. Allocated memory is still 203.4 MB. Free memory was 181.7 MB in the beginning and 168.5 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-08-21 22:58:23,970 INFO L168 Benchmark]: TraceAbstraction took 10857.73 ms. Allocated memory was 203.4 MB in the beginning and 411.6 MB in the end (delta: 208.1 MB). Free memory was 167.8 MB in the beginning and 374.1 MB in the end (delta: -206.2 MB). Peak memory consumption was 247.3 MB. Max. memory is 7.1 GB. [2020-08-21 22:58:23,973 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.25 ms. Allocated memory is still 140.5 MB. Free memory was 103.1 MB in the beginning and 93.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.33 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.5 MB in the beginning and 181.7 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 282.08 ms. Allocated memory is still 203.4 MB. Free memory was 181.7 MB in the beginning and 168.5 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10857.73 ms. Allocated memory was 203.4 MB in the beginning and 411.6 MB in the end (delta: 208.1 MB). Free memory was 167.8 MB in the beginning and 374.1 MB in the end (delta: -206.2 MB). Peak memory consumption was 247.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.5s, OverallIterations: 18, TraceHistogramMax: 17, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 565 SDtfs, 507 SDslu, 3352 SDs, 0 SdLazy, 3111 SolverSat, 338 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 724 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 89 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 545 PreInvPairs, 724 NumberOfFragments, 111 HoareAnnotationTreeSize, 545 FomulaSimplifications, 2493 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 11 FomulaSimplificationsInter, 3928 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 1498 NumberOfCodeBlocks, 1498 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 1480 ConstructedInterpolants, 0 QuantifiedInterpolants, 311578 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 3047/4287 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...