/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:04:11,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:04:11,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:04:11,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:04:11,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:04:11,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:04:11,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:04:11,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:04:11,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:04:11,504 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:04:11,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:04:11,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:04:11,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:04:11,507 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:04:11,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:04:11,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:04:11,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:04:11,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:04:11,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:04:11,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:04:11,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:04:11,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:04:11,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:04:11,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:04:11,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 17:04:11,522 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 17:04:11,522 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 17:04:11,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 17:04:11,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 17:04:11,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-18 17:04:11,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:04:11,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:04:11,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:04:11,537 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 [2020-08-18 17:04:11,558 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:04:11,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:04:11,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:04:11,560 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:04:11,560 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:04:11,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:04:11,561 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:04:11,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:04:11,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:04:11,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:04:11,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:04:11,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:04:11,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:04:11,562 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:04:11,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:04:11,562 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:04:11,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:04:11,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:04:11,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:04:11,563 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:04:11,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:04:11,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:04:11,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:04:11,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:04:11,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:04:11,564 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:04:11,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:04:11,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:04:11,565 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:04:11,565 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 17:04:11,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:04:11,890 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:04:11,894 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:04:11,895 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:04:11,896 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:04:11,896 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-08-18 17:04:11,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/887220e9c/0c0812096fce4df79d723010229f68ed/FLAGf614a91da [2020-08-18 17:04:12,522 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:04:12,523 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-08-18 17:04:12,530 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/887220e9c/0c0812096fce4df79d723010229f68ed/FLAGf614a91da [2020-08-18 17:04:12,914 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/887220e9c/0c0812096fce4df79d723010229f68ed [2020-08-18 17:04:12,925 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:04:12,927 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:04:12,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:04:12,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:04:12,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:04:12,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:04:12" (1/1) ... [2020-08-18 17:04:12,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5db1276a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:12, skipping insertion in model container [2020-08-18 17:04:12,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:04:12" (1/1) ... [2020-08-18 17:04:12,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:04:12,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:04:13,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:04:13,157 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:04:13,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:04:13,187 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:04:13,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:13 WrapperNode [2020-08-18 17:04:13,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:04:13,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:04:13,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:04:13,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:04:13,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:13" (1/1) ... [2020-08-18 17:04:13,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:13" (1/1) ... [2020-08-18 17:04:13,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:13" (1/1) ... [2020-08-18 17:04:13,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:13" (1/1) ... [2020-08-18 17:04:13,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:13" (1/1) ... [2020-08-18 17:04:13,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:13" (1/1) ... [2020-08-18 17:04:13,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:13" (1/1) ... [2020-08-18 17:04:13,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:04:13,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:04:13,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:04:13,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:04:13,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:13" (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 [2020-08-18 17:04:13,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:04:13,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:04:13,377 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-08-18 17:04:13,377 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:04:13,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:04:13,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:04:13,378 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-08-18 17:04:13,378 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:04:13,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:04:13,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:04:13,567 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:04:13,567 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 17:04:13,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:04:13 BoogieIcfgContainer [2020-08-18 17:04:13,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:04:13,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:04:13,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:04:13,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:04:13,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:04:12" (1/3) ... [2020-08-18 17:04:13,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f3447d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:04:13, skipping insertion in model container [2020-08-18 17:04:13,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:04:13" (2/3) ... [2020-08-18 17:04:13,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f3447d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:04:13, skipping insertion in model container [2020-08-18 17:04:13,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:04:13" (3/3) ... [2020-08-18 17:04:13,582 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2020-08-18 17:04:13,595 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:04:13,605 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:04:13,626 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:04:13,707 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:04:13,707 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:04:13,707 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:04:13,707 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:04:13,707 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:04:13,708 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:04:13,708 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:04:13,708 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:04:13,754 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-18 17:04:13,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 17:04:13,762 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:13,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:04:13,763 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:13,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:13,771 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-08-18 17:04:13,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:13,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211370476] [2020-08-18 17:04:13,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:13,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:13,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:04:14,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211370476] [2020-08-18 17:04:14,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:04:14,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:04:14,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290641885] [2020-08-18 17:04:14,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:04:14,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:14,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:04:14,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:04:14,081 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-08-18 17:04:14,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:14,206 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-08-18 17:04:14,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:04:14,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 17:04:14,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:14,219 INFO L225 Difference]: With dead ends: 35 [2020-08-18 17:04:14,219 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 17:04:14,224 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 [2020-08-18 17:04:14,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 17:04:14,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 17:04:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 17:04:14,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-08-18 17:04:14,268 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-08-18 17:04:14,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:14,269 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-08-18 17:04:14,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:04:14,269 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-08-18 17:04:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 17:04:14,271 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:14,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:04:14,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:04:14,272 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:14,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:14,273 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-08-18 17:04:14,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:14,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140226502] [2020-08-18 17:04:14,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:14,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:14,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:04:14,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140226502] [2020-08-18 17:04:14,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:04:14,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:04:14,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45446001] [2020-08-18 17:04:14,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:04:14,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:14,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:04:14,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:04:14,345 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-08-18 17:04:14,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:14,415 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-08-18 17:04:14,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:04:14,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 17:04:14,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:14,417 INFO L225 Difference]: With dead ends: 27 [2020-08-18 17:04:14,418 INFO L226 Difference]: Without dead ends: 23 [2020-08-18 17:04:14,419 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 [2020-08-18 17:04:14,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-18 17:04:14,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-08-18 17:04:14,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 17:04:14,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-08-18 17:04:14,428 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-08-18 17:04:14,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:14,429 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-08-18 17:04:14,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:04:14,429 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-08-18 17:04:14,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 17:04:14,431 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:14,431 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:04:14,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:04:14,432 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:14,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:14,432 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-08-18 17:04:14,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:14,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321438145] [2020-08-18 17:04:14,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:14,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:14,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:14,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:14,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:04:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 17:04:14,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321438145] [2020-08-18 17:04:14,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:14,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 17:04:14,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352541664] [2020-08-18 17:04:14,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 17:04:14,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:14,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 17:04:14,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:04:14,649 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2020-08-18 17:04:14,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:14,764 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-08-18 17:04:14,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 17:04:14,765 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-18 17:04:14,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:14,766 INFO L225 Difference]: With dead ends: 38 [2020-08-18 17:04:14,766 INFO L226 Difference]: Without dead ends: 23 [2020-08-18 17:04:14,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:04:14,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-18 17:04:14,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-08-18 17:04:14,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-18 17:04:14,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-08-18 17:04:14,776 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2020-08-18 17:04:14,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:14,776 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-08-18 17:04:14,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 17:04:14,777 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-08-18 17:04:14,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 17:04:14,778 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:14,779 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:04:14,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:04:14,779 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:14,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:14,780 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-08-18 17:04:14,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:14,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860075754] [2020-08-18 17:04:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:14,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:14,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:14,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:14,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:04:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 17:04:14,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860075754] [2020-08-18 17:04:14,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:14,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 17:04:14,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278962890] [2020-08-18 17:04:14,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:04:14,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:14,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:04:14,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:04:14,898 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-08-18 17:04:15,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:15,024 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2020-08-18 17:04:15,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 17:04:15,024 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-18 17:04:15,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:15,027 INFO L225 Difference]: With dead ends: 41 [2020-08-18 17:04:15,027 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 17:04:15,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:04:15,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 17:04:15,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-08-18 17:04:15,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-18 17:04:15,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2020-08-18 17:04:15,040 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 27 [2020-08-18 17:04:15,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:15,040 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2020-08-18 17:04:15,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:04:15,040 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2020-08-18 17:04:15,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 17:04:15,042 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:15,043 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:04:15,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:04:15,043 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:15,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:15,044 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2020-08-18 17:04:15,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:15,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341265577] [2020-08-18 17:04:15,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:04:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 17:04:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,208 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-18 17:04:15,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341265577] [2020-08-18 17:04:15,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:15,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 17:04:15,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758908692] [2020-08-18 17:04:15,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:04:15,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:15,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:04:15,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:04:15,211 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand 8 states. [2020-08-18 17:04:15,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:15,350 INFO L93 Difference]: Finished difference Result 79 states and 124 transitions. [2020-08-18 17:04:15,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 17:04:15,351 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-18 17:04:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:15,353 INFO L225 Difference]: With dead ends: 79 [2020-08-18 17:04:15,354 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 17:04:15,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:04:15,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 17:04:15,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-08-18 17:04:15,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 17:04:15,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-18 17:04:15,368 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 40 [2020-08-18 17:04:15,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:15,368 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-18 17:04:15,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:04:15,369 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-18 17:04:15,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 17:04:15,371 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:15,371 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:04:15,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:04:15,371 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:15,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:15,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 3 times [2020-08-18 17:04:15,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:15,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085316037] [2020-08-18 17:04:15,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:04:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 17:04:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-18 17:04:15,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085316037] [2020-08-18 17:04:15,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:15,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 17:04:15,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773892475] [2020-08-18 17:04:15,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 17:04:15,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:15,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 17:04:15,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:04:15,495 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 7 states. [2020-08-18 17:04:15,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:15,606 INFO L93 Difference]: Finished difference Result 65 states and 93 transitions. [2020-08-18 17:04:15,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 17:04:15,607 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-08-18 17:04:15,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:15,609 INFO L225 Difference]: With dead ends: 65 [2020-08-18 17:04:15,610 INFO L226 Difference]: Without dead ends: 61 [2020-08-18 17:04:15,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:04:15,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-18 17:04:15,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-08-18 17:04:15,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-18 17:04:15,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 84 transitions. [2020-08-18 17:04:15,626 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 84 transitions. Word has length 41 [2020-08-18 17:04:15,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:15,626 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 84 transitions. [2020-08-18 17:04:15,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 17:04:15,626 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 84 transitions. [2020-08-18 17:04:15,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-18 17:04:15,630 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:15,631 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:04:15,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:04:15,631 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:15,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:15,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 4 times [2020-08-18 17:04:15,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:15,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375586649] [2020-08-18 17:04:15,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:15,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:04:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 17:04:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 17:04:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:04:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 17:04:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 77 proven. 104 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-08-18 17:04:15,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375586649] [2020-08-18 17:04:15,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:15,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 17:04:15,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326169507] [2020-08-18 17:04:15,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 17:04:15,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:15,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 17:04:15,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:04:15,901 INFO L87 Difference]: Start difference. First operand 58 states and 84 transitions. Second operand 11 states. [2020-08-18 17:04:16,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:16,241 INFO L93 Difference]: Finished difference Result 107 states and 178 transitions. [2020-08-18 17:04:16,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 17:04:16,242 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-08-18 17:04:16,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:16,245 INFO L225 Difference]: With dead ends: 107 [2020-08-18 17:04:16,245 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 17:04:16,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-08-18 17:04:16,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 17:04:16,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-18 17:04:16,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 17:04:16,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2020-08-18 17:04:16,259 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 82 [2020-08-18 17:04:16,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:16,259 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2020-08-18 17:04:16,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 17:04:16,260 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2020-08-18 17:04:16,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-18 17:04:16,264 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:16,265 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:04:16,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:04:16,265 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:16,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:16,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 5 times [2020-08-18 17:04:16,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:16,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028358099] [2020-08-18 17:04:16,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:04:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 17:04:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 17:04:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:04:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 17:04:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:04:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 17:04:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 17:04:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:04:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:16,795 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 193 proven. 313 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-08-18 17:04:16,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028358099] [2020-08-18 17:04:16,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:16,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 17:04:16,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960267661] [2020-08-18 17:04:16,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 17:04:16,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:16,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 17:04:16,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-18 17:04:16,800 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand 13 states. [2020-08-18 17:04:17,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:17,240 INFO L93 Difference]: Finished difference Result 114 states and 179 transitions. [2020-08-18 17:04:17,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 17:04:17,241 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 136 [2020-08-18 17:04:17,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:17,244 INFO L225 Difference]: With dead ends: 114 [2020-08-18 17:04:17,244 INFO L226 Difference]: Without dead ends: 73 [2020-08-18 17:04:17,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2020-08-18 17:04:17,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-18 17:04:17,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-08-18 17:04:17,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-18 17:04:17,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2020-08-18 17:04:17,257 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 136 [2020-08-18 17:04:17,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:17,258 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2020-08-18 17:04:17,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 17:04:17,258 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2020-08-18 17:04:17,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-18 17:04:17,260 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:17,260 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:04:17,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:04:17,260 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:17,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:17,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 6 times [2020-08-18 17:04:17,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:17,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776515680] [2020-08-18 17:04:17,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:17,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:17,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:17,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:17,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:17,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:17,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:17,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:04:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:17,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 17:04:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:17,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 17:04:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:17,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:17,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:04:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:17,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 17:04:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:17,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:17,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:17,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:04:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:17,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 17:04:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-08-18 17:04:17,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776515680] [2020-08-18 17:04:17,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:17,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 17:04:17,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963502719] [2020-08-18 17:04:17,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 17:04:17,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:17,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 17:04:17,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-08-18 17:04:17,775 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand 16 states. [2020-08-18 17:04:18,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:18,032 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2020-08-18 17:04:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 17:04:18,033 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 109 [2020-08-18 17:04:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:18,035 INFO L225 Difference]: With dead ends: 76 [2020-08-18 17:04:18,036 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 17:04:18,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-08-18 17:04:18,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 17:04:18,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-08-18 17:04:18,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-18 17:04:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2020-08-18 17:04:18,049 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 109 [2020-08-18 17:04:18,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:18,049 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2020-08-18 17:04:18,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 17:04:18,050 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2020-08-18 17:04:18,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-18 17:04:18,052 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:04:18,052 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:04:18,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:04:18,053 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:04:18,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:04:18,053 INFO L82 PathProgramCache]: Analyzing trace with hash -344605238, now seen corresponding path program 7 times [2020-08-18 17:04:18,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:04:18,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380971172] [2020-08-18 17:04:18,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:04:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:04:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:04:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:04:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 17:04:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 17:04:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:04:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 17:04:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:04:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 17:04:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 17:04:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:04:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 17:04:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:04:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 204 proven. 219 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2020-08-18 17:04:18,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380971172] [2020-08-18 17:04:18,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:04:18,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 17:04:18,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722994151] [2020-08-18 17:04:18,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 17:04:18,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:04:18,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 17:04:18,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:04:18,400 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand 11 states. [2020-08-18 17:04:18,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:04:18,659 INFO L93 Difference]: Finished difference Result 135 states and 192 transitions. [2020-08-18 17:04:18,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 17:04:18,660 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136 [2020-08-18 17:04:18,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:04:18,661 INFO L225 Difference]: With dead ends: 135 [2020-08-18 17:04:18,661 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 17:04:18,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-08-18 17:04:18,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 17:04:18,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 17:04:18,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 17:04:18,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 17:04:18,665 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 136 [2020-08-18 17:04:18,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:04:18,665 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 17:04:18,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 17:04:18,665 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 17:04:18,666 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 17:04:18,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:04:18,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 17:04:19,082 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2020-08-18 17:04:19,131 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 17:04:19,131 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:04:19,131 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:04:19,131 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 17:04:19,132 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 17:04:19,132 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 17:04:19,132 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2020-08-18 17:04:19,132 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-08-18 17:04:19,132 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-08-18 17:04:19,132 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-08-18 17:04:19,132 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-08-18 17:04:19,133 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2020-08-18 17:04:19,133 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-08-18 17:04:19,133 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2020-08-18 17:04:19,133 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2020-08-18 17:04:19,133 INFO L268 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2020-08-18 17:04:19,133 INFO L268 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2020-08-18 17:04:19,133 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (not (<= |fibo_#in~n| 1)) (= fibo_~n |fibo_#in~n|)) [2020-08-18 17:04:19,133 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-08-18 17:04:19,134 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse1 (<= 1 |fibo_#t~ret0|)) (.cse2 (<= |fibo_#t~ret0| 1)) (.cse0 (= fibo_~n |fibo_#in~n|))) (or (and (<= 3 |fibo_#t~ret0|) (<= 5 fibo_~n) (<= |fibo_#t~ret0| 3) .cse0) (and .cse0 (<= 6 |fibo_#in~n|)) (and .cse1 (<= 2 |fibo_#in~n|) .cse2 (<= |fibo_#in~n| 2) .cse0) (and (<= |fibo_#in~n| 4) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) .cse0 (<= 4 |fibo_#in~n|)) (and .cse1 .cse2 .cse0 (<= 3 |fibo_#in~n|) (<= |fibo_#in~n| 3)))) [2020-08-18 17:04:19,134 INFO L268 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2020-08-18 17:04:19,134 INFO L268 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-08-18 17:04:19,134 INFO L268 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2020-08-18 17:04:19,135 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-08-18 17:04:19,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:04:19 BoogieIcfgContainer [2020-08-18 17:04:19,142 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:04:19,145 INFO L168 Benchmark]: Toolchain (without parser) took 6217.60 ms. Allocated memory was 146.3 MB in the beginning and 314.0 MB in the end (delta: 167.8 MB). Free memory was 101.7 MB in the beginning and 270.6 MB in the end (delta: -168.9 MB). Peak memory consumption was 147.3 MB. Max. memory is 7.1 GB. [2020-08-18 17:04:19,145 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 17:04:19,146 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.32 ms. Allocated memory is still 146.3 MB. Free memory was 101.5 MB in the beginning and 92.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-18 17:04:19,147 INFO L168 Benchmark]: Boogie Preprocessor took 117.17 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 92.3 MB in the beginning and 180.5 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-18 17:04:19,148 INFO L168 Benchmark]: RCFGBuilder took 265.20 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 168.6 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:04:19,149 INFO L168 Benchmark]: TraceAbstraction took 5569.25 ms. Allocated memory was 201.9 MB in the beginning and 314.0 MB in the end (delta: 112.2 MB). Free memory was 167.9 MB in the beginning and 270.6 MB in the end (delta: -102.7 MB). Peak memory consumption was 157.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:04:19,153 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.32 ms. Allocated memory is still 146.3 MB. Free memory was 101.5 MB in the beginning and 92.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.17 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 92.3 MB in the beginning and 180.5 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 265.20 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 168.6 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5569.25 ms. Allocated memory was 201.9 MB in the beginning and 314.0 MB in the end (delta: 112.2 MB). Free memory was 167.9 MB in the beginning and 270.6 MB in the end (delta: -102.7 MB). Peak memory consumption was 157.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.9s, OverallIterations: 10, TraceHistogramMax: 19, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 218 SDtfs, 262 SDslu, 932 SDs, 0 SdLazy, 996 SolverSat, 220 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 345 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 25 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 137 PreInvPairs, 171 NumberOfFragments, 89 HoareAnnotationTreeSize, 137 FomulaSimplifications, 126 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 703 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 624 NumberOfCodeBlocks, 624 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 614 ConstructedInterpolants, 0 QuantifiedInterpolants, 134010 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 1993/2854 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...