/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=BIGGEST --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_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:19:19,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:19:19,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:19:19,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:19:19,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:19:19,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:19:20,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:19:20,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:19:20,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:19:20,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:19:20,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:19:20,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:19:20,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:19:20,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:19:20,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:19:20,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:19:20,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:19:20,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:19:20,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:19:20,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:19:20,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:19:20,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:19:20,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:19:20,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:19:20,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:19:20,048 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:19:20,048 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:19:20,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:19:20,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:19:20,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 17:19:20,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 17:19:20,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 17:19:20,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 17:19:20,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 17:19:20,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 17:19:20,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 17:19:20,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 17:19:20,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 17:19:20,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:19:20,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:19:20,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:19:20,062 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 17:19:20,109 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:19:20,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:19:20,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:19:20,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:19:20,112 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:19:20,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:19:20,113 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:19:20,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:19:20,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:19:20,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:19:20,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:19:20,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:19:20,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:19:20,116 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:19:20,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:19:20,116 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:19:20,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:19:20,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:19:20,117 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:19:20,117 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:19:20,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:19:20,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:19:20,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:19:20,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:19:20,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:19:20,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:19:20,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:19:20,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:19:20,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:19:20,119 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=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:19:20,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:19:20,443 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:19:20,447 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:19:20,449 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:19:20,449 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:19:20,450 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-08-21 17:19:20,537 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/910f478a0/98262195c9be4426a85c9c9aee37c98f/FLAG6f0fff85b [2020-08-21 17:19:21,080 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:19:21,081 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-08-21 17:19:21,090 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/910f478a0/98262195c9be4426a85c9c9aee37c98f/FLAG6f0fff85b [2020-08-21 17:19:21,420 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/910f478a0/98262195c9be4426a85c9c9aee37c98f [2020-08-21 17:19:21,433 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:19:21,435 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:19:21,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:19:21,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:19:21,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:19:21,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:19:21" (1/1) ... [2020-08-21 17:19:21,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a86aac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:21, skipping insertion in model container [2020-08-21 17:19:21,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:19:21" (1/1) ... [2020-08-21 17:19:21,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:19:21,476 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:19:21,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:19:21,677 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:19:21,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:19:21,714 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:19:21,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:21 WrapperNode [2020-08-21 17:19:21,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:19:21,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:19:21,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:19:21,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:19:21,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:21" (1/1) ... [2020-08-21 17:19:21,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:21" (1/1) ... [2020-08-21 17:19:21,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:21" (1/1) ... [2020-08-21 17:19:21,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:21" (1/1) ... [2020-08-21 17:19:21,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:21" (1/1) ... [2020-08-21 17:19:21,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:21" (1/1) ... [2020-08-21 17:19:21,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:21" (1/1) ... [2020-08-21 17:19:21,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:19:21,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:19:21,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:19:21,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:19:21,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:21" (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 17:19:21,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:19:21,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:19:21,941 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-21 17:19:21,941 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-21 17:19:21,941 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:19:21,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:19:21,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:19:21,941 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-21 17:19:21,942 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-21 17:19:21,942 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:19:21,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:19:21,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:19:22,155 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:19:22,156 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 17:19:22,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:19:22 BoogieIcfgContainer [2020-08-21 17:19:22,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:19:22,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:19:22,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:19:22,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:19:22,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:19:21" (1/3) ... [2020-08-21 17:19:22,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c4f23d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:19:22, skipping insertion in model container [2020-08-21 17:19:22,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:21" (2/3) ... [2020-08-21 17:19:22,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c4f23d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:19:22, skipping insertion in model container [2020-08-21 17:19:22,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:19:22" (3/3) ... [2020-08-21 17:19:22,171 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2020-08-21 17:19:22,185 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:19:22,194 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:19:22,210 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:19:22,283 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:19:22,283 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:19:22,283 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:19:22,284 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:19:22,285 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:19:22,285 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:19:22,286 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:19:22,286 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:19:22,311 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-21 17:19:22,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 17:19:22,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:22,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:19:22,329 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:22,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:22,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-21 17:19:22,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:22,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418203065] [2020-08-21 17:19:22,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:22,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:22,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:22,600 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 17:19:22,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418203065] [2020-08-21 17:19:22,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:19:22,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 17:19:22,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477502908] [2020-08-21 17:19:22,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:19:22,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:22,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:19:22,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:19:22,631 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-21 17:19:22,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:22,756 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-21 17:19:22,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:19:22,759 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 17:19:22,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:22,771 INFO L225 Difference]: With dead ends: 44 [2020-08-21 17:19:22,771 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 17:19:22,775 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 17:19:22,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 17:19:22,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 17:19:22,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 17:19:22,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-21 17:19:22,824 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-21 17:19:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:22,825 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-21 17:19:22,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:19:22,825 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-21 17:19:22,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 17:19:22,829 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:22,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:19:22,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:19:22,832 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:22,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:22,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-21 17:19:22,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:22,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617599251] [2020-08-21 17:19:22,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:22,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:22,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:22,927 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 17:19:22,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617599251] [2020-08-21 17:19:22,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:19:22,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 17:19:22,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889946200] [2020-08-21 17:19:22,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:19:22,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:22,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:19:22,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:19:22,936 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-21 17:19:23,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:23,037 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-21 17:19:23,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:19:23,039 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-21 17:19:23,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:23,041 INFO L225 Difference]: With dead ends: 36 [2020-08-21 17:19:23,041 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 17:19:23,042 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 17:19:23,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 17:19:23,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 17:19:23,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 17:19:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-21 17:19:23,053 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-21 17:19:23,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:23,053 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-21 17:19:23,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:19:23,054 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-21 17:19:23,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 17:19:23,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:23,056 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 17:19:23,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:19:23,057 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:23,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:23,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-21 17:19:23,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:23,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635862821] [2020-08-21 17:19:23,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:23,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:23,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:23,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:23,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:19:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:23,196 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 17:19:23,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635862821] [2020-08-21 17:19:23,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:19:23,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 17:19:23,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119618320] [2020-08-21 17:19:23,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:19:23,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:23,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:19:23,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:19:23,200 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-21 17:19:23,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:23,302 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-21 17:19:23,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 17:19:23,303 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-21 17:19:23,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:23,305 INFO L225 Difference]: With dead ends: 58 [2020-08-21 17:19:23,305 INFO L226 Difference]: Without dead ends: 34 [2020-08-21 17:19:23,307 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 17:19:23,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-21 17:19:23,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-21 17:19:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 17:19:23,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-21 17:19:23,318 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-21 17:19:23,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:23,319 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-21 17:19:23,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:19:23,319 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-21 17:19:23,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 17:19:23,321 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:23,321 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 17:19:23,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:19:23,322 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:23,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:23,323 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-21 17:19:23,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:23,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612671946] [2020-08-21 17:19:23,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:23,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:23,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:23,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:23,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:19:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:23,496 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 17:19:23,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612671946] [2020-08-21 17:19:23,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:19:23,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 17:19:23,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874437932] [2020-08-21 17:19:23,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:19:23,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:23,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:19:23,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:19:23,500 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-21 17:19:23,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:23,715 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-21 17:19:23,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:19:23,715 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-21 17:19:23,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:23,719 INFO L225 Difference]: With dead ends: 54 [2020-08-21 17:19:23,720 INFO L226 Difference]: Without dead ends: 50 [2020-08-21 17:19:23,721 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 17:19:23,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-21 17:19:23,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-21 17:19:23,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 17:19:23,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-21 17:19:23,736 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-21 17:19:23,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:23,736 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-21 17:19:23,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:19:23,737 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-21 17:19:23,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-21 17:19:23,739 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:23,739 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 17:19:23,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:19:23,740 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:23,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:23,740 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-21 17:19:23,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:23,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62484901] [2020-08-21 17:19:23,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:23,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:23,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:23,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:23,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:23,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:19:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:23,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:19:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:23,871 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 17:19:23,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62484901] [2020-08-21 17:19:23,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:19:23,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 17:19:23,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566734744] [2020-08-21 17:19:23,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:19:23,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:23,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:19:23,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:19:23,875 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-21 17:19:23,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:23,955 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-21 17:19:23,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 17:19:23,956 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-21 17:19:23,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:23,958 INFO L225 Difference]: With dead ends: 94 [2020-08-21 17:19:23,959 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 17:19:23,960 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 17:19:23,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 17:19:23,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-21 17:19:23,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-21 17:19:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-21 17:19:23,973 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-21 17:19:23,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:23,974 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-21 17:19:23,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:19:23,974 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-21 17:19:23,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 17:19:23,977 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:23,977 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 17:19:23,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:19:23,978 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:23,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:23,978 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-21 17:19:23,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:23,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52508418] [2020-08-21 17:19:23,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:19:24,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 17:19:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,118 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 17:19:24,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52508418] [2020-08-21 17:19:24,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:19:24,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 17:19:24,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450626769] [2020-08-21 17:19:24,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:19:24,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:24,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:19:24,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:19:24,121 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-21 17:19:24,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:24,246 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-21 17:19:24,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 17:19:24,247 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-21 17:19:24,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:24,249 INFO L225 Difference]: With dead ends: 103 [2020-08-21 17:19:24,249 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 17:19:24,251 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 17:19:24,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 17:19:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-21 17:19:24,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 17:19:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-21 17:19:24,264 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-21 17:19:24,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:24,264 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-21 17:19:24,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:19:24,265 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-21 17:19:24,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 17:19:24,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:24,267 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 17:19:24,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:19:24,268 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:24,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:24,268 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-21 17:19:24,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:24,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128987400] [2020-08-21 17:19:24,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:24,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:19:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 17:19:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,482 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 17:19:24,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128987400] [2020-08-21 17:19:24,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:19:24,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 17:19:24,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348528125] [2020-08-21 17:19:24,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:19:24,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:24,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:19:24,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:19:24,489 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-21 17:19:24,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:24,724 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-21 17:19:24,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 17:19:24,726 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-21 17:19:24,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:24,729 INFO L225 Difference]: With dead ends: 86 [2020-08-21 17:19:24,729 INFO L226 Difference]: Without dead ends: 82 [2020-08-21 17:19:24,730 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 17:19:24,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-21 17:19:24,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-21 17:19:24,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 17:19:24,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-21 17:19:24,765 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-21 17:19:24,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:24,768 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-21 17:19:24,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:19:24,768 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-21 17:19:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 17:19:24,775 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:24,775 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 17:19:24,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:19:24,778 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:24,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:24,779 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-21 17:19:24,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:24,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604180926] [2020-08-21 17:19:24,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:19:24,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 17:19:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 17:19:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:24,995 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 17:19:24,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604180926] [2020-08-21 17:19:24,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:19:24,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 17:19:24,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324927726] [2020-08-21 17:19:24,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:19:24,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:24,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:19:24,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:19:24,998 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-21 17:19:25,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:25,134 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-21 17:19:25,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:19:25,135 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-21 17:19:25,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:25,137 INFO L225 Difference]: With dead ends: 167 [2020-08-21 17:19:25,138 INFO L226 Difference]: Without dead ends: 94 [2020-08-21 17:19:25,139 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 17:19:25,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-21 17:19:25,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-21 17:19:25,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 17:19:25,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-21 17:19:25,156 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-21 17:19:25,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:25,156 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-21 17:19:25,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:19:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-21 17:19:25,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 17:19:25,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:25,158 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 17:19:25,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:19:25,159 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:25,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:25,159 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-21 17:19:25,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:25,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327807977] [2020-08-21 17:19:25,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:19:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 17:19:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:19:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,299 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 17:19:25,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327807977] [2020-08-21 17:19:25,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:19:25,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 17:19:25,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674481842] [2020-08-21 17:19:25,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:19:25,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:25,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:19:25,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:19:25,301 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-21 17:19:25,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:25,544 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-21 17:19:25,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:19:25,545 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-21 17:19:25,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:25,548 INFO L225 Difference]: With dead ends: 188 [2020-08-21 17:19:25,548 INFO L226 Difference]: Without dead ends: 109 [2020-08-21 17:19:25,550 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 17:19:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-21 17:19:25,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-21 17:19:25,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-21 17:19:25,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-21 17:19:25,592 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-21 17:19:25,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:25,593 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-21 17:19:25,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:19:25,593 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-21 17:19:25,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-21 17:19:25,597 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:25,598 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 17:19:25,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:19:25,598 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:25,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:25,598 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-21 17:19:25,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:25,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310157642] [2020-08-21 17:19:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:19:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 17:19:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:19:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:19:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 17:19:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:25,885 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 17:19:25,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310157642] [2020-08-21 17:19:25,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:19:25,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 17:19:25,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888818942] [2020-08-21 17:19:25,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 17:19:25,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:25,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 17:19:25,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:19:25,894 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-21 17:19:26,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:26,286 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-21 17:19:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 17:19:26,286 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-21 17:19:26,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:26,288 INFO L225 Difference]: With dead ends: 199 [2020-08-21 17:19:26,288 INFO L226 Difference]: Without dead ends: 86 [2020-08-21 17:19:26,290 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 17:19:26,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-21 17:19:26,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-08-21 17:19:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 17:19:26,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2020-08-21 17:19:26,299 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 82 [2020-08-21 17:19:26,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:26,300 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2020-08-21 17:19:26,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 17:19:26,300 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2020-08-21 17:19:26,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-21 17:19:26,301 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:26,301 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:19:26,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 17:19:26,302 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:26,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:26,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 1 times [2020-08-21 17:19:26,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:26,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833149118] [2020-08-21 17:19:26,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:26,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:26,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:26,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:26,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:26,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:26,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:19:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:26,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 17:19:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:26,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:19:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:26,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:26,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:19:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-08-21 17:19:26,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833149118] [2020-08-21 17:19:26,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:19:26,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 17:19:26,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467553284] [2020-08-21 17:19:26,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 17:19:26,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:26,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 17:19:26,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-21 17:19:26,695 INFO L87 Difference]: Start difference. First operand 76 states and 100 transitions. Second operand 17 states. [2020-08-21 17:19:26,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:26,922 INFO L93 Difference]: Finished difference Result 96 states and 126 transitions. [2020-08-21 17:19:26,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 17:19:26,923 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-08-21 17:19:26,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:26,924 INFO L225 Difference]: With dead ends: 96 [2020-08-21 17:19:26,924 INFO L226 Difference]: Without dead ends: 92 [2020-08-21 17:19:26,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-08-21 17:19:26,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-21 17:19:26,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-08-21 17:19:26,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 17:19:26,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2020-08-21 17:19:26,934 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 68 [2020-08-21 17:19:26,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:26,935 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2020-08-21 17:19:26,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 17:19:26,935 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2020-08-21 17:19:26,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-21 17:19:26,936 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:26,936 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:19:26,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 17:19:26,937 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:26,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:26,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1711191765, now seen corresponding path program 2 times [2020-08-21 17:19:26,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:26,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239258985] [2020-08-21 17:19:26,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:26,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:26,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:26,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:26,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:26,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:19:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 17:19:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 17:19:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:19:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-08-21 17:19:27,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239258985] [2020-08-21 17:19:27,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:19:27,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 17:19:27,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565182272] [2020-08-21 17:19:27,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:19:27,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:27,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:19:27,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:19:27,032 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand 7 states. [2020-08-21 17:19:27,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:27,115 INFO L93 Difference]: Finished difference Result 143 states and 199 transitions. [2020-08-21 17:19:27,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:19:27,115 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-08-21 17:19:27,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:27,117 INFO L225 Difference]: With dead ends: 143 [2020-08-21 17:19:27,117 INFO L226 Difference]: Without dead ends: 70 [2020-08-21 17:19:27,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:19:27,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-21 17:19:27,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-21 17:19:27,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 17:19:27,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2020-08-21 17:19:27,125 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 69 [2020-08-21 17:19:27,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:27,125 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2020-08-21 17:19:27,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:19:27,125 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2020-08-21 17:19:27,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-21 17:19:27,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:27,127 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 17:19:27,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 17:19:27,127 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:27,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:27,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 3 times [2020-08-21 17:19:27,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:27,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326451651] [2020-08-21 17:19:27,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:19:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 17:19:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:19:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 17:19:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:19:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 17:19:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:19:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,378 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 17:19:27,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326451651] [2020-08-21 17:19:27,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:19:27,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 17:19:27,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136470621] [2020-08-21 17:19:27,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:19:27,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:27,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:19:27,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:19:27,380 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 10 states. [2020-08-21 17:19:27,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:27,550 INFO L93 Difference]: Finished difference Result 131 states and 175 transitions. [2020-08-21 17:19:27,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 17:19:27,550 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2020-08-21 17:19:27,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:27,552 INFO L225 Difference]: With dead ends: 131 [2020-08-21 17:19:27,552 INFO L226 Difference]: Without dead ends: 70 [2020-08-21 17:19:27,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 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 17:19:27,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-21 17:19:27,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-21 17:19:27,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 17:19:27,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2020-08-21 17:19:27,560 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 110 [2020-08-21 17:19:27,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:27,560 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2020-08-21 17:19:27,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:19:27,561 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2020-08-21 17:19:27,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-21 17:19:27,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:27,563 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:19:27,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 17:19:27,563 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:27,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:27,564 INFO L82 PathProgramCache]: Analyzing trace with hash 2011292190, now seen corresponding path program 2 times [2020-08-21 17:19:27,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:27,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672887635] [2020-08-21 17:19:27,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:19:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 17:19:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:19:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:19:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 17:19:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:19:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 17:19:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:19:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:19:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 40 proven. 124 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-08-21 17:19:27,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672887635] [2020-08-21 17:19:27,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:19:27,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 17:19:27,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073780178] [2020-08-21 17:19:27,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:19:27,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:27,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:19:27,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:19:27,811 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 10 states. [2020-08-21 17:19:28,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:28,054 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2020-08-21 17:19:28,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:19:28,055 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 136 [2020-08-21 17:19:28,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:28,056 INFO L225 Difference]: With dead ends: 77 [2020-08-21 17:19:28,056 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 17:19:28,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-08-21 17:19:28,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 17:19:28,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 17:19:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 17:19:28,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 17:19:28,058 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 136 [2020-08-21 17:19:28,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:28,058 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 17:19:28,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:19:28,059 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 17:19:28,059 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 17:19:28,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 17:19:28,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 17:19:28,509 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 15 [2020-08-21 17:19:28,704 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2020-08-21 17:19:28,707 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 17:19:28,707 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:19:28,708 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:19:28,708 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 17:19:28,708 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 17:19:28,708 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 17:19:28,708 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-08-21 17:19:28,708 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-08-21 17:19:28,708 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-08-21 17:19:28,709 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-08-21 17:19:28,709 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-21 17:19:28,709 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-21 17:19:28,709 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 4 main_~x~0) (<= main_~x~0 4)) [2020-08-21 17:19:28,709 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-08-21 17:19:28,709 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-08-21 17:19:28,709 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-08-21 17:19:28,710 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 17:19:28,710 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-21 17:19:28,711 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= |fibo2_#t~ret2| 1) .cse0 (<= 1 |fibo2_#t~ret2|) (<= 2 |fibo2_#in~n|) (<= |fibo2_#in~n| 2)) (and (<= 4 fibo2_~n) .cse0))) [2020-08-21 17:19:28,711 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-08-21 17:19:28,711 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-08-21 17:19:28,711 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-08-21 17:19:28,712 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-08-21 17:19:28,712 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-08-21 17:19:28,712 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-08-21 17:19:28,712 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 2)) (= fibo1_~n |fibo1_#in~n|)) [2020-08-21 17:19:28,712 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-08-21 17:19:28,713 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= |fibo1_#in~n| 3) .cse0) (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2) .cse0) (and (<= 5 |fibo1_#in~n|) .cse0))) (not (<= |fibo1_#in~n| 2)) (or (and (<= |fibo1_#t~ret0| 1) (<= 1 |fibo1_#t~ret0|)) (<= 4 fibo1_~n))) [2020-08-21 17:19:28,713 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-08-21 17:19:28,713 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-08-21 17:19:28,713 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-08-21 17:19:28,714 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-08-21 17:19:28,714 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-08-21 17:19:28,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:19:28 BoogieIcfgContainer [2020-08-21 17:19:28,722 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:19:28,725 INFO L168 Benchmark]: Toolchain (without parser) took 7290.04 ms. Allocated memory was 139.5 MB in the beginning and 305.1 MB in the end (delta: 165.7 MB). Free memory was 102.4 MB in the beginning and 133.7 MB in the end (delta: -31.2 MB). Peak memory consumption was 134.4 MB. Max. memory is 7.1 GB. [2020-08-21 17:19:28,727 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-08-21 17:19:28,729 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.82 ms. Allocated memory is still 139.5 MB. Free memory was 102.2 MB in the beginning and 92.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-21 17:19:28,736 INFO L168 Benchmark]: Boogie Preprocessor took 148.40 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 92.6 MB in the beginning and 182.6 MB in the end (delta: -90.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-21 17:19:28,741 INFO L168 Benchmark]: RCFGBuilder took 295.59 ms. Allocated memory is still 203.9 MB. Free memory was 182.6 MB in the beginning and 169.6 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-21 17:19:28,742 INFO L168 Benchmark]: TraceAbstraction took 6560.24 ms. Allocated memory was 203.9 MB in the beginning and 305.1 MB in the end (delta: 101.2 MB). Free memory was 168.9 MB in the beginning and 133.7 MB in the end (delta: 35.2 MB). Peak memory consumption was 136.4 MB. Max. memory is 7.1 GB. [2020-08-21 17:19:28,748 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 279.82 ms. Allocated memory is still 139.5 MB. Free memory was 102.2 MB in the beginning and 92.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 148.40 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 92.6 MB in the beginning and 182.6 MB in the end (delta: -90.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 295.59 ms. Allocated memory is still 203.9 MB. Free memory was 182.6 MB in the beginning and 169.6 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6560.24 ms. Allocated memory was 203.9 MB in the beginning and 305.1 MB in the end (delta: 101.2 MB). Free memory was 168.9 MB in the beginning and 133.7 MB in the end (delta: 35.2 MB). Peak memory consumption was 136.4 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: 5.7s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 436 SDtfs, 293 SDslu, 2109 SDs, 0 SdLazy, 1544 SolverSat, 158 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 405 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=9, 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, 14 MinimizatonAttempts, 48 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 344 PreInvPairs, 398 NumberOfFragments, 94 HoareAnnotationTreeSize, 344 FomulaSimplifications, 448 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 11 FomulaSimplificationsInter, 770 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 774 NumberOfCodeBlocks, 774 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 760 ConstructedInterpolants, 0 QuantifiedInterpolants, 103564 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 816/1159 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...