/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-89f541c [2020-08-27 21:49:24,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:49:24,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:49:24,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:49:24,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:49:24,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:49:24,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:49:24,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:49:24,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:49:24,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:49:24,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:49:24,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:49:24,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:49:24,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:49:24,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:49:24,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:49:24,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:49:24,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:49:24,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:49:24,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:49:24,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:49:24,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:49:24,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:49:24,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:49:24,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-27 21:49:24,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-27 21:49:24,450 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-27 21:49:24,451 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-27 21:49:24,452 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-27 21:49:24,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-27 21:49:24,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-27 21:49:24,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-27 21:49:24,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-27 21:49:24,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-27 21:49:24,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-27 21:49:24,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-27 21:49:24,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-27 21:49:24,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-27 21:49:24,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:49:24,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:49:24,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:49:24,461 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 [2020-08-27 21:49:24,485 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:49:24,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:49:24,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:49:24,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:49:24,487 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:49:24,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:49:24,487 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:49:24,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:49:24,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:49:24,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:49:24,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:49:24,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:49:24,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:49:24,489 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:49:24,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:49:24,489 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:49:24,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:49:24,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:49:24,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:49:24,490 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:49:24,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:49:24,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:49:24,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:49:24,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:49:24,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:49:24,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:49:24,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:49:24,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:49:24,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:49:24,492 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 -> false [2020-08-27 21:49:24,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:49:24,997 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:49:25,001 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:49:25,003 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:49:25,004 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:49:25,006 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-08-27 21:49:25,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c5abca08/071497195b354747918ff54ee6cdd7ed/FLAG7a10c9657 [2020-08-27 21:49:25,662 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:49:25,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-08-27 21:49:25,673 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c5abca08/071497195b354747918ff54ee6cdd7ed/FLAG7a10c9657 [2020-08-27 21:49:25,995 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c5abca08/071497195b354747918ff54ee6cdd7ed [2020-08-27 21:49:26,010 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:49:26,013 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:49:26,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:49:26,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:49:26,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:49:26,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:49:25" (1/1) ... [2020-08-27 21:49:26,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23bccf0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:26, skipping insertion in model container [2020-08-27 21:49:26,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:49:25" (1/1) ... [2020-08-27 21:49:26,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:49:26,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:49:26,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:49:26,287 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:49:26,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:49:26,320 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:49:26,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:26 WrapperNode [2020-08-27 21:49:26,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:49:26,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:49:26,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:49:26,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:49:26,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:26" (1/1) ... [2020-08-27 21:49:26,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:26" (1/1) ... [2020-08-27 21:49:26,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:26" (1/1) ... [2020-08-27 21:49:26,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:26" (1/1) ... [2020-08-27 21:49:26,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:26" (1/1) ... [2020-08-27 21:49:26,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:26" (1/1) ... [2020-08-27 21:49:26,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:26" (1/1) ... [2020-08-27 21:49:26,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:49:26,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:49:26,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:49:26,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:49:26,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:26" (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 [2020-08-27 21:49:26,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:49:26,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:49:26,514 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-27 21:49:26,515 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-27 21:49:26,515 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:49:26,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:49:26,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:49:26,515 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-27 21:49:26,516 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-27 21:49:26,516 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:49:26,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:49:26,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:49:26,738 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:49:26,738 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-27 21:49:26,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:49:26 BoogieIcfgContainer [2020-08-27 21:49:26,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:49:26,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:49:26,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:49:26,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:49:26,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:49:25" (1/3) ... [2020-08-27 21:49:26,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19dffd36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:49:26, skipping insertion in model container [2020-08-27 21:49:26,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:26" (2/3) ... [2020-08-27 21:49:26,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19dffd36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:49:26, skipping insertion in model container [2020-08-27 21:49:26,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:49:26" (3/3) ... [2020-08-27 21:49:26,755 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-2.c [2020-08-27 21:49:26,775 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:49:26,801 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 21:49:26,830 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 21:49:26,884 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:49:26,885 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:49:26,885 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:49:26,885 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:49:26,886 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:49:26,886 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:49:26,886 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:49:26,886 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:49:26,914 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-27 21:49:26,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-27 21:49:26,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:26,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:26,923 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:26,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:26,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-27 21:49:26,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:26,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660860057] [2020-08-27 21:49:26,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:27,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:27,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:49:27,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660860057] [2020-08-27 21:49:27,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:49:27,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:49:27,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932710699] [2020-08-27 21:49:27,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:49:27,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:27,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:49:27,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:49:27,261 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-27 21:49:27,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:27,394 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-27 21:49:27,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:49:27,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-27 21:49:27,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:27,410 INFO L225 Difference]: With dead ends: 44 [2020-08-27 21:49:27,410 INFO L226 Difference]: Without dead ends: 30 [2020-08-27 21:49:27,416 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 [2020-08-27 21:49:27,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-27 21:49:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-27 21:49:27,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-27 21:49:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-27 21:49:27,473 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-27 21:49:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:27,474 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-27 21:49:27,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:49:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-27 21:49:27,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-27 21:49:27,476 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:27,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:27,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:49:27,478 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:27,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:27,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-27 21:49:27,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:27,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165421299] [2020-08-27 21:49:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:27,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:27,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:27,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:49:27,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165421299] [2020-08-27 21:49:27,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:49:27,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:49:27,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464183868] [2020-08-27 21:49:27,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:49:27,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:27,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:49:27,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:49:27,567 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-27 21:49:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:27,637 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-27 21:49:27,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:49:27,638 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-27 21:49:27,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:27,640 INFO L225 Difference]: With dead ends: 36 [2020-08-27 21:49:27,640 INFO L226 Difference]: Without dead ends: 32 [2020-08-27 21:49:27,641 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 [2020-08-27 21:49:27,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-27 21:49:27,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-27 21:49:27,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-27 21:49:27,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-27 21:49:27,652 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-27 21:49:27,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:27,653 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-27 21:49:27,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:49:27,653 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-27 21:49:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-27 21:49:27,655 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:27,655 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] [2020-08-27 21:49:27,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:49:27,655 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:27,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:27,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-27 21:49:27,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:27,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068245693] [2020-08-27 21:49:27,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:27,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:27,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:27,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:27,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:27,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:49:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-27 21:49:27,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068245693] [2020-08-27 21:49:27,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:27,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-27 21:49:27,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263381765] [2020-08-27 21:49:27,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-27 21:49:27,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:27,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-27 21:49:27,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-27 21:49:27,802 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-27 21:49:27,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:27,905 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-27 21:49:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-27 21:49:27,906 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-27 21:49:27,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:27,908 INFO L225 Difference]: With dead ends: 58 [2020-08-27 21:49:27,908 INFO L226 Difference]: Without dead ends: 34 [2020-08-27 21:49:27,910 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 [2020-08-27 21:49:27,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-27 21:49:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-27 21:49:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-27 21:49:27,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-27 21:49:27,922 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-27 21:49:27,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:27,922 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-27 21:49:27,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-27 21:49:27,923 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-27 21:49:27,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-27 21:49:27,925 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:27,925 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] [2020-08-27 21:49:27,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:49:27,926 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:27,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:27,927 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-27 21:49:27,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:27,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097501184] [2020-08-27 21:49:27,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:27,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:27,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:28,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:28,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-27 21:49:28,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097501184] [2020-08-27 21:49:28,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:28,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-27 21:49:28,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281914028] [2020-08-27 21:49:28,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-27 21:49:28,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:28,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-27 21:49:28,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-27 21:49:28,133 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-27 21:49:28,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:28,381 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-27 21:49:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-27 21:49:28,382 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-27 21:49:28,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:28,389 INFO L225 Difference]: With dead ends: 54 [2020-08-27 21:49:28,389 INFO L226 Difference]: Without dead ends: 50 [2020-08-27 21:49:28,390 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 [2020-08-27 21:49:28,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-27 21:49:28,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-27 21:49:28,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-27 21:49:28,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-27 21:49:28,422 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-27 21:49:28,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:28,423 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-27 21:49:28,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-27 21:49:28,425 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-27 21:49:28,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-27 21:49:28,429 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:28,429 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] [2020-08-27 21:49:28,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:49:28,430 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:28,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:28,430 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-27 21:49:28,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:28,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831270838] [2020-08-27 21:49:28,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:28,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:28,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:28,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:28,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:28,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:49:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:28,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-27 21:49:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-27 21:49:28,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831270838] [2020-08-27 21:49:28,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:28,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-27 21:49:28,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365669810] [2020-08-27 21:49:28,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:49:28,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:28,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:49:28,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:49:28,568 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-27 21:49:28,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:28,667 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-27 21:49:28,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-27 21:49:28,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-27 21:49:28,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:28,670 INFO L225 Difference]: With dead ends: 94 [2020-08-27 21:49:28,670 INFO L226 Difference]: Without dead ends: 52 [2020-08-27 21:49:28,672 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 [2020-08-27 21:49:28,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-27 21:49:28,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-27 21:49:28,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-27 21:49:28,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-27 21:49:28,684 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-27 21:49:28,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:28,684 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-27 21:49:28,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:49:28,685 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-27 21:49:28,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-27 21:49:28,687 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:28,687 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] [2020-08-27 21:49:28,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 21:49:28,687 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:28,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:28,688 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-27 21:49:28,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:28,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846467414] [2020-08-27 21:49:28,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:28,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:28,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:28,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:28,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:28,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:28,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:28,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-27 21:49:28,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846467414] [2020-08-27 21:49:28,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:28,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-27 21:49:28,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732155642] [2020-08-27 21:49:28,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-27 21:49:28,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:28,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-27 21:49:28,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:49:28,837 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-27 21:49:28,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:28,959 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-27 21:49:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-27 21:49:28,960 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-27 21:49:28,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:28,962 INFO L225 Difference]: With dead ends: 103 [2020-08-27 21:49:28,962 INFO L226 Difference]: Without dead ends: 57 [2020-08-27 21:49:28,964 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 [2020-08-27 21:49:28,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-27 21:49:28,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-27 21:49:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-27 21:49:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-27 21:49:28,975 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-27 21:49:28,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:28,976 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-27 21:49:28,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-27 21:49:28,976 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-27 21:49:28,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-27 21:49:28,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:28,978 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] [2020-08-27 21:49:28,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-27 21:49:28,979 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:28,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:28,979 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-27 21:49:28,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:28,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095047235] [2020-08-27 21:49:28,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-27 21:49:29,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095047235] [2020-08-27 21:49:29,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:29,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-27 21:49:29,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806610492] [2020-08-27 21:49:29,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-27 21:49:29,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:29,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-27 21:49:29,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:49:29,105 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-27 21:49:29,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:29,295 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-27 21:49:29,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-27 21:49:29,296 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-27 21:49:29,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:29,299 INFO L225 Difference]: With dead ends: 86 [2020-08-27 21:49:29,299 INFO L226 Difference]: Without dead ends: 82 [2020-08-27 21:49:29,300 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 [2020-08-27 21:49:29,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-27 21:49:29,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-27 21:49:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-27 21:49:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-27 21:49:29,317 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-27 21:49:29,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:29,318 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-27 21:49:29,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-27 21:49:29,318 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-27 21:49:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-27 21:49:29,321 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:29,322 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] [2020-08-27 21:49:29,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-27 21:49:29,322 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:29,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:29,323 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-27 21:49:29,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:29,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56941161] [2020-08-27 21:49:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:29,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-27 21:49:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-27 21:49:29,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56941161] [2020-08-27 21:49:29,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:29,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-27 21:49:29,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258113254] [2020-08-27 21:49:29,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-27 21:49:29,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:29,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-27 21:49:29,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:49:29,501 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-27 21:49:29,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:29,625 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-27 21:49:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-27 21:49:29,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-27 21:49:29,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:29,628 INFO L225 Difference]: With dead ends: 167 [2020-08-27 21:49:29,628 INFO L226 Difference]: Without dead ends: 94 [2020-08-27 21:49:29,629 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 [2020-08-27 21:49:29,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-27 21:49:29,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-27 21:49:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-27 21:49:29,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-27 21:49:29,647 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-27 21:49:29,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:29,648 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-27 21:49:29,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-27 21:49:29,648 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-27 21:49:29,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-27 21:49:29,651 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:29,651 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] [2020-08-27 21:49:29,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-27 21:49:29,652 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:29,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:29,652 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-27 21:49:29,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:29,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913226307] [2020-08-27 21:49:29,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:49:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-27 21:49:29,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913226307] [2020-08-27 21:49:29,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:29,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-27 21:49:29,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669187513] [2020-08-27 21:49:29,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-27 21:49:29,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:29,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-27 21:49:29,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-27 21:49:29,835 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-27 21:49:30,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:30,077 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-27 21:49:30,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-27 21:49:30,078 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-27 21:49:30,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:30,080 INFO L225 Difference]: With dead ends: 188 [2020-08-27 21:49:30,081 INFO L226 Difference]: Without dead ends: 109 [2020-08-27 21:49:30,082 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 [2020-08-27 21:49:30,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-27 21:49:30,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-27 21:49:30,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-27 21:49:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-27 21:49:30,100 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-27 21:49:30,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:30,100 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-27 21:49:30,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-27 21:49:30,101 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-27 21:49:30,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-27 21:49:30,103 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:30,103 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] [2020-08-27 21:49:30,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-27 21:49:30,104 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:30,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:30,104 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-27 21:49:30,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:30,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874466196] [2020-08-27 21:49:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:30,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:30,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:30,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:30,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:30,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:30,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:30,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:30,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:49:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:30,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:30,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:30,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:30,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-27 21:49:30,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874466196] [2020-08-27 21:49:30,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:30,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-27 21:49:30,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695394049] [2020-08-27 21:49:30,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-27 21:49:30,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:30,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-27 21:49:30,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-27 21:49:30,432 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-27 21:49:30,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:30,867 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-27 21:49:30,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-27 21:49:30,868 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-27 21:49:30,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:30,872 INFO L225 Difference]: With dead ends: 199 [2020-08-27 21:49:30,872 INFO L226 Difference]: Without dead ends: 86 [2020-08-27 21:49:30,874 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 [2020-08-27 21:49:30,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-27 21:49:30,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2020-08-27 21:49:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-27 21:49:30,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2020-08-27 21:49:30,892 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 82 [2020-08-27 21:49:30,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:30,892 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2020-08-27 21:49:30,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-27 21:49:30,893 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2020-08-27 21:49:30,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-27 21:49:30,896 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:30,897 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] [2020-08-27 21:49:30,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-27 21:49:30,897 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:30,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:30,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 2 times [2020-08-27 21:49:30,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:30,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899393122] [2020-08-27 21:49:30,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:30,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:30,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:49:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-27 21:49:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:49:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-08-27 21:49:31,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899393122] [2020-08-27 21:49:31,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:31,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-27 21:49:31,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234787093] [2020-08-27 21:49:31,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-27 21:49:31,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:31,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-27 21:49:31,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-27 21:49:31,270 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand 10 states. [2020-08-27 21:49:31,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:31,484 INFO L93 Difference]: Finished difference Result 142 states and 204 transitions. [2020-08-27 21:49:31,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-27 21:49:31,485 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2020-08-27 21:49:31,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:31,487 INFO L225 Difference]: With dead ends: 142 [2020-08-27 21:49:31,487 INFO L226 Difference]: Without dead ends: 78 [2020-08-27 21:49:31,488 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 [2020-08-27 21:49:31,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-27 21:49:31,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-27 21:49:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-27 21:49:31,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2020-08-27 21:49:31,497 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 110 [2020-08-27 21:49:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:31,498 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2020-08-27 21:49:31,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-27 21:49:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2020-08-27 21:49:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-27 21:49:31,501 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:31,502 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:31,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-27 21:49:31,502 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:31,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:31,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1263382818, now seen corresponding path program 3 times [2020-08-27 21:49:31,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:31,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51168265] [2020-08-27 21:49:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:49:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-27 21:49:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:31,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-27 21:49:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:32,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:32,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:32,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:32,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:32,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:32,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:49:32,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:32,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:32,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:32,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:32,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:32,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-27 21:49:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:32,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:32,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 133 proven. 373 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2020-08-27 21:49:32,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51168265] [2020-08-27 21:49:32,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:32,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-27 21:49:32,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128182990] [2020-08-27 21:49:32,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-27 21:49:32,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:32,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-27 21:49:32,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-08-27 21:49:32,285 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 15 states. [2020-08-27 21:49:32,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:32,953 INFO L93 Difference]: Finished difference Result 184 states and 282 transitions. [2020-08-27 21:49:32,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-27 21:49:32,954 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 192 [2020-08-27 21:49:32,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:32,958 INFO L225 Difference]: With dead ends: 184 [2020-08-27 21:49:32,959 INFO L226 Difference]: Without dead ends: 111 [2020-08-27 21:49:32,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2020-08-27 21:49:32,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-27 21:49:32,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2020-08-27 21:49:32,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-27 21:49:32,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2020-08-27 21:49:32,975 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 192 [2020-08-27 21:49:32,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:32,977 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2020-08-27 21:49:32,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-27 21:49:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2020-08-27 21:49:32,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-27 21:49:32,982 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:32,982 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, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:32,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-27 21:49:32,983 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:32,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:32,983 INFO L82 PathProgramCache]: Analyzing trace with hash -2102107778, now seen corresponding path program 1 times [2020-08-27 21:49:32,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:32,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427250530] [2020-08-27 21:49:32,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:49:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-27 21:49:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-27 21:49:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 109 proven. 85 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-08-27 21:49:33,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427250530] [2020-08-27 21:49:33,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:33,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-27 21:49:33,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928866404] [2020-08-27 21:49:33,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-27 21:49:33,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:33,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-27 21:49:33,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-27 21:49:33,374 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand 11 states. [2020-08-27 21:49:33,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:33,658 INFO L93 Difference]: Finished difference Result 188 states and 266 transitions. [2020-08-27 21:49:33,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-27 21:49:33,659 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136 [2020-08-27 21:49:33,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:33,662 INFO L225 Difference]: With dead ends: 188 [2020-08-27 21:49:33,662 INFO L226 Difference]: Without dead ends: 101 [2020-08-27 21:49:33,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-27 21:49:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-27 21:49:33,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2020-08-27 21:49:33,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-27 21:49:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 130 transitions. [2020-08-27 21:49:33,689 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 130 transitions. Word has length 136 [2020-08-27 21:49:33,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:33,692 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 130 transitions. [2020-08-27 21:49:33,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-27 21:49:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 130 transitions. [2020-08-27 21:49:33,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-27 21:49:33,697 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:33,697 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:33,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-27 21:49:33,698 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:33,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:33,698 INFO L82 PathProgramCache]: Analyzing trace with hash 677703633, now seen corresponding path program 2 times [2020-08-27 21:49:33,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:33,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346941348] [2020-08-27 21:49:33,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:33,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:49:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-27 21:49:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:49:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-27 21:49:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 138 proven. 250 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2020-08-27 21:49:34,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346941348] [2020-08-27 21:49:34,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:34,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-27 21:49:34,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487830058] [2020-08-27 21:49:34,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-27 21:49:34,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:34,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-27 21:49:34,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-27 21:49:34,291 INFO L87 Difference]: Start difference. First operand 98 states and 130 transitions. Second operand 14 states. [2020-08-27 21:49:34,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:34,873 INFO L93 Difference]: Finished difference Result 217 states and 326 transitions. [2020-08-27 21:49:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-27 21:49:34,874 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 177 [2020-08-27 21:49:34,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:34,876 INFO L225 Difference]: With dead ends: 217 [2020-08-27 21:49:34,876 INFO L226 Difference]: Without dead ends: 124 [2020-08-27 21:49:34,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2020-08-27 21:49:34,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-27 21:49:34,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2020-08-27 21:49:34,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-27 21:49:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 144 transitions. [2020-08-27 21:49:34,891 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 144 transitions. Word has length 177 [2020-08-27 21:49:34,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:34,892 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 144 transitions. [2020-08-27 21:49:34,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-27 21:49:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 144 transitions. [2020-08-27 21:49:34,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-27 21:49:34,894 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:34,894 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:34,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-27 21:49:34,895 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:34,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:34,895 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 3 times [2020-08-27 21:49:34,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:34,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069597660] [2020-08-27 21:49:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:34,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:49:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-27 21:49:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-27 21:49:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 144 proven. 139 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-08-27 21:49:35,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069597660] [2020-08-27 21:49:35,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:35,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-27 21:49:35,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900186141] [2020-08-27 21:49:35,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-27 21:49:35,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:35,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-27 21:49:35,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-27 21:49:35,330 INFO L87 Difference]: Start difference. First operand 107 states and 144 transitions. Second operand 14 states. [2020-08-27 21:49:35,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:35,879 INFO L93 Difference]: Finished difference Result 211 states and 302 transitions. [2020-08-27 21:49:35,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-27 21:49:35,879 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 150 [2020-08-27 21:49:35,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:35,882 INFO L225 Difference]: With dead ends: 211 [2020-08-27 21:49:35,882 INFO L226 Difference]: Without dead ends: 114 [2020-08-27 21:49:35,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-08-27 21:49:35,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-27 21:49:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-08-27 21:49:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-27 21:49:35,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 147 transitions. [2020-08-27 21:49:35,899 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 147 transitions. Word has length 150 [2020-08-27 21:49:35,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:35,900 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 147 transitions. [2020-08-27 21:49:35,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-27 21:49:35,900 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 147 transitions. [2020-08-27 21:49:35,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-27 21:49:35,903 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:35,903 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:35,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-27 21:49:35,903 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:35,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:35,904 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 4 times [2020-08-27 21:49:35,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:35,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001989601] [2020-08-27 21:49:35,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-27 21:49:35,946 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-27 21:49:35,948 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-27 21:49:35,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-27 21:49:35,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:49:35 BoogieIcfgContainer [2020-08-27 21:49:35,993 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-27 21:49:35,997 INFO L168 Benchmark]: Toolchain (without parser) took 9983.34 ms. Allocated memory was 138.9 MB in the beginning and 357.6 MB in the end (delta: 218.6 MB). Free memory was 101.9 MB in the beginning and 247.1 MB in the end (delta: -145.1 MB). Peak memory consumption was 73.5 MB. Max. memory is 7.1 GB. [2020-08-27 21:49:35,998 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-27 21:49:35,998 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.64 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 92.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-27 21:49:35,999 INFO L168 Benchmark]: Boogie Preprocessor took 112.19 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 92.2 MB in the beginning and 179.4 MB in the end (delta: -87.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-27 21:49:36,000 INFO L168 Benchmark]: RCFGBuilder took 309.29 ms. Allocated memory is still 201.3 MB. Free memory was 179.4 MB in the beginning and 165.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-08-27 21:49:36,001 INFO L168 Benchmark]: TraceAbstraction took 9248.10 ms. Allocated memory was 201.3 MB in the beginning and 357.6 MB in the end (delta: 156.2 MB). Free memory was 165.8 MB in the beginning and 247.1 MB in the end (delta: -81.3 MB). Peak memory consumption was 75.0 MB. Max. memory is 7.1 GB. [2020-08-27 21:49:36,004 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 305.64 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 92.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.19 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 92.2 MB in the beginning and 179.4 MB in the end (delta: -87.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 309.29 ms. Allocated memory is still 201.3 MB. Free memory was 179.4 MB in the beginning and 165.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9248.10 ms. Allocated memory was 201.3 MB in the beginning and 357.6 MB in the end (delta: 156.2 MB). Free memory was 165.8 MB in the beginning and 247.1 MB in the end (delta: -81.3 MB). Peak memory consumption was 75.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 6; [L37] CALL, EXPR fibo1(x) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 8 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.0s, OverallIterations: 16, TraceHistogramMax: 17, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 460 SDtfs, 472 SDslu, 2192 SDs, 0 SdLazy, 2644 SolverSat, 335 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 569 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 77 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 1333 NumberOfCodeBlocks, 1333 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1141 ConstructedInterpolants, 0 QuantifiedInterpolants, 236129 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 2308/3324 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 incorrect! Received shutdown request...