/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 15:27:24,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 15:27:24,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 15:27:25,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 15:27:25,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 15:27:25,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 15:27:25,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 15:27:25,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 15:27:25,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 15:27:25,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 15:27:25,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 15:27:25,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 15:27:25,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 15:27:25,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 15:27:25,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 15:27:25,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 15:27:25,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 15:27:25,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 15:27:25,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 15:27:25,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 15:27:25,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 15:27:25,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 15:27:25,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 15:27:25,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 15:27:25,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 15:27:25,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 15:27:25,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 15:27:25,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 15:27:25,092 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 15:27:25,135 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 15:27:25,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 15:27:25,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 15:27:25,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 15:27:25,138 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 15:27:25,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 15:27:25,139 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 15:27:25,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 15:27:25,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 15:27:25,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 15:27:25,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 15:27:25,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 15:27:25,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 15:27:25,141 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 15:27:25,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 15:27:25,142 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 15:27:25,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 15:27:25,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 15:27:25,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 15:27:25,142 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 15:27:25,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 15:27:25,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:27:25,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 15:27:25,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 15:27:25,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 15:27:25,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 15:27:25,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 15:27:25,144 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 15:27:25,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 15:27:25,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-18 15:27:25,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 15:27:25,462 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 15:27:25,466 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 15:27:25,468 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 15:27:25,468 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 15:27:25,469 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-08-18 15:27:25,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/85454ce1f/0eb5ea5c408d4332b50998bbbc9f4e11/FLAGabf0d7c21 [2020-08-18 15:27:26,056 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 15:27:26,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-08-18 15:27:26,064 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/85454ce1f/0eb5ea5c408d4332b50998bbbc9f4e11/FLAGabf0d7c21 [2020-08-18 15:27:26,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/85454ce1f/0eb5ea5c408d4332b50998bbbc9f4e11 [2020-08-18 15:27:26,495 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 15:27:26,497 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 15:27:26,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 15:27:26,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 15:27:26,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 15:27:26,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:27:26" (1/1) ... [2020-08-18 15:27:26,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b0e6cc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:26, skipping insertion in model container [2020-08-18 15:27:26,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:27:26" (1/1) ... [2020-08-18 15:27:26,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 15:27:26,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 15:27:26,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:27:26,719 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 15:27:26,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:27:26,751 INFO L208 MainTranslator]: Completed translation [2020-08-18 15:27:26,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:26 WrapperNode [2020-08-18 15:27:26,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 15:27:26,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 15:27:26,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 15:27:26,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 15:27:26,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:26" (1/1) ... [2020-08-18 15:27:26,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:26" (1/1) ... [2020-08-18 15:27:26,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:26" (1/1) ... [2020-08-18 15:27:26,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:26" (1/1) ... [2020-08-18 15:27:26,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:26" (1/1) ... [2020-08-18 15:27:26,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:26" (1/1) ... [2020-08-18 15:27:26,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:26" (1/1) ... [2020-08-18 15:27:26,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 15:27:26,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 15:27:26,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 15:27:26,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 15:27:26,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:27:26,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 15:27:26,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 15:27:26,936 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-18 15:27:26,936 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-18 15:27:26,936 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 15:27:26,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 15:27:26,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 15:27:26,937 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-18 15:27:26,937 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-18 15:27:26,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 15:27:26,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 15:27:26,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 15:27:27,155 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 15:27:27,156 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 15:27:27,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:27:27 BoogieIcfgContainer [2020-08-18 15:27:27,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 15:27:27,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 15:27:27,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 15:27:27,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 15:27:27,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:27:26" (1/3) ... [2020-08-18 15:27:27,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e471cc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:27:27, skipping insertion in model container [2020-08-18 15:27:27,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:27:26" (2/3) ... [2020-08-18 15:27:27,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e471cc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:27:27, skipping insertion in model container [2020-08-18 15:27:27,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:27:27" (3/3) ... [2020-08-18 15:27:27,196 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2020-08-18 15:27:27,221 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 15:27:27,243 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 15:27:27,257 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 15:27:27,282 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 15:27:27,283 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 15:27:27,283 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 15:27:27,283 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 15:27:27,283 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 15:27:27,284 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 15:27:27,284 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 15:27:27,284 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 15:27:27,303 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-18 15:27:27,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 15:27:27,310 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:27,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:27,312 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:27,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:27,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-18 15:27:27,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:27,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39990120] [2020-08-18 15:27:27,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:27,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:27,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:27,543 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 15:27:27,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39990120] [2020-08-18 15:27:27,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:27:27,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 15:27:27,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532348880] [2020-08-18 15:27:27,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:27:27,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:27,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:27:27,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:27:27,572 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-18 15:27:27,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:27,691 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-18 15:27:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:27:27,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 15:27:27,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:27,705 INFO L225 Difference]: With dead ends: 44 [2020-08-18 15:27:27,706 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 15:27:27,710 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 15:27:27,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 15:27:27,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 15:27:27,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 15:27:27,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-18 15:27:27,760 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-18 15:27:27,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:27,761 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-18 15:27:27,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:27:27,761 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-18 15:27:27,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 15:27:27,763 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:27,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:27,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 15:27:27,764 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:27,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:27,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-18 15:27:27,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:27,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009818328] [2020-08-18 15:27:27,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:27,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:27,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:27,826 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 15:27:27,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009818328] [2020-08-18 15:27:27,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:27:27,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 15:27:27,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20300953] [2020-08-18 15:27:27,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:27:27,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:27,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:27:27,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:27:27,831 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-18 15:27:27,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:27,896 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-18 15:27:27,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:27:27,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 15:27:27,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:27,899 INFO L225 Difference]: With dead ends: 36 [2020-08-18 15:27:27,899 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 15:27:27,900 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 15:27:27,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 15:27:27,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 15:27:27,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 15:27:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-18 15:27:27,911 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-18 15:27:27,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:27,911 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-18 15:27:27,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:27:27,912 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-18 15:27:27,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 15:27:27,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:27,913 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:27,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 15:27:27,914 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:27,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:27,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-18 15:27:27,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:27,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428603506] [2020-08-18 15:27:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:27,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:27,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 15:27:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 15:27:28,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428603506] [2020-08-18 15:27:28,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:28,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 15:27:28,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399582433] [2020-08-18 15:27:28,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 15:27:28,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:28,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 15:27:28,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:27:28,048 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-18 15:27:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:28,143 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-18 15:27:28,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 15:27:28,144 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-18 15:27:28,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:28,145 INFO L225 Difference]: With dead ends: 58 [2020-08-18 15:27:28,146 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 15:27:28,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:27:28,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 15:27:28,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-18 15:27:28,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 15:27:28,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-18 15:27:28,157 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-18 15:27:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:28,158 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-18 15:27:28,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 15:27:28,158 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-18 15:27:28,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 15:27:28,160 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:28,161 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:28,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 15:27:28,161 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:28,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:28,162 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-18 15:27:28,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:28,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090002682] [2020-08-18 15:27:28,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 15:27:28,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090002682] [2020-08-18 15:27:28,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:28,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 15:27:28,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334770395] [2020-08-18 15:27:28,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 15:27:28,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:28,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 15:27:28,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:27:28,345 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-18 15:27:28,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:28,580 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-18 15:27:28,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:27:28,581 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-18 15:27:28,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:28,587 INFO L225 Difference]: With dead ends: 54 [2020-08-18 15:27:28,588 INFO L226 Difference]: Without dead ends: 50 [2020-08-18 15:27:28,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:27:28,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-18 15:27:28,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-18 15:27:28,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 15:27:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-18 15:27:28,605 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-18 15:27:28,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:28,606 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-18 15:27:28,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 15:27:28,606 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-18 15:27:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-18 15:27:28,608 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:28,608 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:28,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 15:27:28,609 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:28,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:28,609 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-18 15:27:28,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:28,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235072068] [2020-08-18 15:27:28,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 15:27:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 15:27:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 15:27:28,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235072068] [2020-08-18 15:27:28,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:28,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 15:27:28,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997502864] [2020-08-18 15:27:28,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 15:27:28,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:28,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 15:27:28,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:27:28,719 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-18 15:27:28,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:28,804 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-18 15:27:28,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 15:27:28,805 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-18 15:27:28,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:28,806 INFO L225 Difference]: With dead ends: 94 [2020-08-18 15:27:28,807 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 15:27:28,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:27:28,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 15:27:28,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-18 15:27:28,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-18 15:27:28,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-18 15:27:28,821 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-18 15:27:28,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:28,822 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-18 15:27:28,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 15:27:28,822 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-18 15:27:28,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 15:27:28,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:28,824 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:28,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 15:27:28,825 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:28,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:28,825 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-18 15:27:28,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:28,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83257216] [2020-08-18 15:27:28,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-18 15:27:28,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83257216] [2020-08-18 15:27:28,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:28,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 15:27:28,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117666760] [2020-08-18 15:27:28,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:27:28,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:28,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:27:28,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:27:28,970 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-18 15:27:29,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:29,088 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-18 15:27:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 15:27:29,089 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-18 15:27:29,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:29,091 INFO L225 Difference]: With dead ends: 103 [2020-08-18 15:27:29,091 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 15:27:29,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:27:29,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 15:27:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-18 15:27:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 15:27:29,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-18 15:27:29,105 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-18 15:27:29,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:29,106 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-18 15:27:29,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:27:29,106 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-18 15:27:29,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 15:27:29,108 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:29,109 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:29,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 15:27:29,109 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:29,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:29,110 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-18 15:27:29,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:29,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186895082] [2020-08-18 15:27:29,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 15:27:29,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186895082] [2020-08-18 15:27:29,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:29,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 15:27:29,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766096705] [2020-08-18 15:27:29,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:27:29,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:29,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:27:29,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:27:29,307 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-18 15:27:29,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:29,530 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-18 15:27:29,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 15:27:29,531 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-18 15:27:29,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:29,533 INFO L225 Difference]: With dead ends: 86 [2020-08-18 15:27:29,534 INFO L226 Difference]: Without dead ends: 82 [2020-08-18 15:27:29,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:27:29,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-18 15:27:29,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-18 15:27:29,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 15:27:29,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-18 15:27:29,554 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-18 15:27:29,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:29,554 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-18 15:27:29,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:27:29,555 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-18 15:27:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 15:27:29,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:29,559 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:29,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 15:27:29,560 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:29,560 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-18 15:27:29,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:29,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072705306] [2020-08-18 15:27:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 15:27:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-18 15:27:29,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072705306] [2020-08-18 15:27:29,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:29,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 15:27:29,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276016435] [2020-08-18 15:27:29,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:27:29,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:29,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:27:29,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:27:29,712 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-18 15:27:29,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:29,827 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-18 15:27:29,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:27:29,828 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-18 15:27:29,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:29,830 INFO L225 Difference]: With dead ends: 167 [2020-08-18 15:27:29,830 INFO L226 Difference]: Without dead ends: 94 [2020-08-18 15:27:29,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:27:29,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-18 15:27:29,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-18 15:27:29,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-18 15:27:29,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-18 15:27:29,848 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-18 15:27:29,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:29,848 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-18 15:27:29,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:27:29,849 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-18 15:27:29,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 15:27:29,851 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:29,851 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:29,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 15:27:29,851 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:29,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:29,852 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-18 15:27:29,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:29,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320626553] [2020-08-18 15:27:29,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:29,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:30,001 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 15:27:30,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320626553] [2020-08-18 15:27:30,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:30,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 15:27:30,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89500224] [2020-08-18 15:27:30,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 15:27:30,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:30,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 15:27:30,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:27:30,004 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-18 15:27:30,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:30,208 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-18 15:27:30,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 15:27:30,209 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-18 15:27:30,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:30,212 INFO L225 Difference]: With dead ends: 188 [2020-08-18 15:27:30,212 INFO L226 Difference]: Without dead ends: 109 [2020-08-18 15:27:30,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-18 15:27:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-18 15:27:30,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-18 15:27:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-18 15:27:30,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-18 15:27:30,251 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-18 15:27:30,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:30,251 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-18 15:27:30,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 15:27:30,252 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-18 15:27:30,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-18 15:27:30,255 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:30,255 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:30,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 15:27:30,256 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:30,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:30,256 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-18 15:27:30,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:30,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255730840] [2020-08-18 15:27:30,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:30,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:30,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:30,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:30,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:30,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:30,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:30,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:30,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:30,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:30,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:30,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:30,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-18 15:27:30,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255730840] [2020-08-18 15:27:30,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:30,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 15:27:30,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884172105] [2020-08-18 15:27:30,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 15:27:30,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:30,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 15:27:30,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-18 15:27:30,524 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-18 15:27:30,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:30,889 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-18 15:27:30,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 15:27:30,890 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-18 15:27:30,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:30,893 INFO L225 Difference]: With dead ends: 199 [2020-08-18 15:27:30,894 INFO L226 Difference]: Without dead ends: 86 [2020-08-18 15:27:30,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-08-18 15:27:30,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-18 15:27:30,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-08-18 15:27:30,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 15:27:30,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2020-08-18 15:27:30,911 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 82 [2020-08-18 15:27:30,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:30,912 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2020-08-18 15:27:30,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 15:27:30,912 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2020-08-18 15:27:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-18 15:27:30,914 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:30,914 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:30,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 15:27:30,914 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:30,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:30,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 1 times [2020-08-18 15:27:30,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:30,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788332715] [2020-08-18 15:27:30,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:30,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:30,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-08-18 15:27:31,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788332715] [2020-08-18 15:27:31,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:31,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 15:27:31,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248845101] [2020-08-18 15:27:31,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 15:27:31,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:31,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 15:27:31,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-18 15:27:31,310 INFO L87 Difference]: Start difference. First operand 76 states and 100 transitions. Second operand 17 states. [2020-08-18 15:27:31,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:31,513 INFO L93 Difference]: Finished difference Result 96 states and 126 transitions. [2020-08-18 15:27:31,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 15:27:31,514 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-08-18 15:27:31,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:31,516 INFO L225 Difference]: With dead ends: 96 [2020-08-18 15:27:31,516 INFO L226 Difference]: Without dead ends: 92 [2020-08-18 15:27:31,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-08-18 15:27:31,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-18 15:27:31,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-08-18 15:27:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 15:27:31,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2020-08-18 15:27:31,527 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 68 [2020-08-18 15:27:31,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:31,527 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2020-08-18 15:27:31,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 15:27:31,528 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2020-08-18 15:27:31,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-18 15:27:31,529 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:31,529 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:31,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 15:27:31,529 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:31,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:31,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1711191765, now seen corresponding path program 2 times [2020-08-18 15:27:31,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:31,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876887065] [2020-08-18 15:27:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:31,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 15:27:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 15:27:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-08-18 15:27:31,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876887065] [2020-08-18 15:27:31,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:31,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 15:27:31,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251182213] [2020-08-18 15:27:31,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 15:27:31,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:31,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 15:27:31,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:27:31,631 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand 7 states. [2020-08-18 15:27:31,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:31,715 INFO L93 Difference]: Finished difference Result 143 states and 199 transitions. [2020-08-18 15:27:31,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:27:31,716 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-08-18 15:27:31,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:31,717 INFO L225 Difference]: With dead ends: 143 [2020-08-18 15:27:31,717 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 15:27:31,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:27:31,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 15:27:31,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-18 15:27:31,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 15:27:31,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2020-08-18 15:27:31,725 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 69 [2020-08-18 15:27:31,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:31,725 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2020-08-18 15:27:31,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 15:27:31,726 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2020-08-18 15:27:31,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-18 15:27:31,727 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:31,727 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:31,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 15:27:31,728 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:31,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:31,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 3 times [2020-08-18 15:27:31,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:31,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541643240] [2020-08-18 15:27:31,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:31,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 15:27:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:31,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-08-18 15:27:32,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541643240] [2020-08-18 15:27:32,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:32,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 15:27:32,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016826434] [2020-08-18 15:27:32,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 15:27:32,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:32,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 15:27:32,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:27:32,042 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 10 states. [2020-08-18 15:27:32,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:32,205 INFO L93 Difference]: Finished difference Result 131 states and 175 transitions. [2020-08-18 15:27:32,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 15:27:32,206 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2020-08-18 15:27:32,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:32,207 INFO L225 Difference]: With dead ends: 131 [2020-08-18 15:27:32,207 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 15:27:32,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-18 15:27:32,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 15:27:32,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-18 15:27:32,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 15:27:32,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2020-08-18 15:27:32,218 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 110 [2020-08-18 15:27:32,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:32,220 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2020-08-18 15:27:32,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 15:27:32,220 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2020-08-18 15:27:32,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-18 15:27:32,221 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:27:32,222 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:27:32,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 15:27:32,222 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:27:32,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:27:32,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2011292190, now seen corresponding path program 2 times [2020-08-18 15:27:32,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:27:32,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282060530] [2020-08-18 15:27:32,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:27:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:27:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:27:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 15:27:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:27:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:27:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 15:27:32,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:27:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:27:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 40 proven. 124 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-08-18 15:27:32,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282060530] [2020-08-18 15:27:32,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:27:32,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 15:27:32,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669240593] [2020-08-18 15:27:32,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 15:27:32,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:27:32,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 15:27:32,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:27:32,534 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 10 states. [2020-08-18 15:27:32,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:27:32,753 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2020-08-18 15:27:32,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 15:27:32,754 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 136 [2020-08-18 15:27:32,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:27:32,755 INFO L225 Difference]: With dead ends: 77 [2020-08-18 15:27:32,755 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 15:27:32,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-08-18 15:27:32,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 15:27:32,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 15:27:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 15:27:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 15:27:32,757 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 136 [2020-08-18 15:27:32,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:27:32,758 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 15:27:32,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 15:27:32,758 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 15:27:32,758 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 15:27:32,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 15:27:32,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 15:27:33,456 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2020-08-18 15:27:33,460 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 15:27:33,461 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 15:27:33,461 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 15:27:33,461 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 15:27:33,461 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 15:27:33,461 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 15:27:33,461 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-08-18 15:27:33,462 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-08-18 15:27:33,462 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-08-18 15:27:33,462 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-08-18 15:27:33,462 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-18 15:27:33,462 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-18 15:27:33,462 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 4 main_~x~0) (<= main_~x~0 4)) [2020-08-18 15:27:33,462 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-08-18 15:27:33,463 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-08-18 15:27:33,463 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-08-18 15:27:33,463 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-08-18 15:27:33,463 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-18 15:27:33,463 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= |fibo2_#t~ret2| 1) .cse0 (<= 1 |fibo2_#t~ret2|) (<= 2 |fibo2_#in~n|) (<= |fibo2_#in~n| 2)) (and (<= 4 fibo2_~n) .cse0))) [2020-08-18 15:27:33,463 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-08-18 15:27:33,463 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-08-18 15:27:33,464 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-08-18 15:27:33,464 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-08-18 15:27:33,464 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-08-18 15:27:33,464 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-08-18 15:27:33,464 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 2)) (= fibo1_~n |fibo1_#in~n|)) [2020-08-18 15:27:33,464 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-08-18 15:27:33,464 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= |fibo1_#in~n| 3) .cse0) (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2) .cse0) (and (<= 5 |fibo1_#in~n|) .cse0))) (not (<= |fibo1_#in~n| 2)) (or (and (<= |fibo1_#t~ret0| 1) (<= 1 |fibo1_#t~ret0|)) (<= 4 fibo1_~n))) [2020-08-18 15:27:33,465 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-08-18 15:27:33,465 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-08-18 15:27:33,465 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-08-18 15:27:33,465 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-08-18 15:27:33,465 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-08-18 15:27:33,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 03:27:33 BoogieIcfgContainer [2020-08-18 15:27:33,470 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 15:27:33,472 INFO L168 Benchmark]: Toolchain (without parser) took 6975.29 ms. Allocated memory was 139.5 MB in the beginning and 314.6 MB in the end (delta: 175.1 MB). Free memory was 102.8 MB in the beginning and 147.4 MB in the end (delta: -44.6 MB). Peak memory consumption was 130.5 MB. Max. memory is 7.1 GB. [2020-08-18 15:27:33,473 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-08-18 15:27:33,473 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.91 ms. Allocated memory is still 139.5 MB. Free memory was 102.4 MB in the beginning and 92.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-18 15:27:33,474 INFO L168 Benchmark]: Boogie Preprocessor took 118.72 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.9 MB in the beginning and 180.2 MB in the end (delta: -87.2 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 15:27:33,475 INFO L168 Benchmark]: RCFGBuilder took 291.39 ms. Allocated memory is still 201.9 MB. Free memory was 180.2 MB in the beginning and 166.5 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-08-18 15:27:33,476 INFO L168 Benchmark]: TraceAbstraction took 6294.79 ms. Allocated memory was 201.9 MB in the beginning and 314.6 MB in the end (delta: 112.7 MB). Free memory was 166.5 MB in the beginning and 147.4 MB in the end (delta: 19.1 MB). Peak memory consumption was 131.8 MB. Max. memory is 7.1 GB. [2020-08-18 15:27:33,479 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.91 ms. Allocated memory is still 139.5 MB. Free memory was 102.4 MB in the beginning and 92.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.72 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.9 MB in the beginning and 180.2 MB in the end (delta: -87.2 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 291.39 ms. Allocated memory is still 201.9 MB. Free memory was 180.2 MB in the beginning and 166.5 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6294.79 ms. Allocated memory was 201.9 MB in the beginning and 314.6 MB in the end (delta: 112.7 MB). Free memory was 166.5 MB in the beginning and 147.4 MB in the end (delta: 19.1 MB). Peak memory consumption was 131.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.4s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 436 SDtfs, 293 SDslu, 2109 SDs, 0 SdLazy, 1563 SolverSat, 150 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 405 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 48 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 344 PreInvPairs, 398 NumberOfFragments, 94 HoareAnnotationTreeSize, 344 FomulaSimplifications, 448 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 11 FomulaSimplificationsInter, 770 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 774 NumberOfCodeBlocks, 774 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 760 ConstructedInterpolants, 0 QuantifiedInterpolants, 103564 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 816/1159 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...