/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:05:39,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:05:39,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:05:39,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:05:39,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:05:39,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:05:39,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:05:39,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:05:39,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:05:39,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:05:39,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:05:39,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:05:39,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:05:39,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:05:39,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:05:39,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:05:39,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:05:39,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:05:39,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:05:39,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:05:39,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:05:39,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:05:39,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:05:39,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:05:39,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 21:05:39,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:05:39,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:05:39,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:05:39,372 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 21:05:39,395 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:05:39,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:05:39,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:05:39,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:05:39,397 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:05:39,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:05:39,397 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:05:39,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:05:39,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:05:39,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:05:39,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:05:39,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:05:39,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:05:39,399 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:05:39,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:05:39,399 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:05:39,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:05:39,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:05:39,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:05:39,400 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:05:39,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:05:39,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:05:39,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:05:39,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:05:39,401 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:05:39,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:05:39,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:05:39,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:05:39,402 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:05:39,402 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:05:39,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:05:39,728 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:05:39,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:05:39,733 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:05:39,734 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:05:39,736 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-08-18 21:05:39,817 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d752f7802/79cb02cd3cda4bdf9e8f1252492dbf56/FLAG46adf5e9c [2020-08-18 21:05:40,283 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:05:40,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-08-18 21:05:40,297 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d752f7802/79cb02cd3cda4bdf9e8f1252492dbf56/FLAG46adf5e9c [2020-08-18 21:05:40,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d752f7802/79cb02cd3cda4bdf9e8f1252492dbf56 [2020-08-18 21:05:40,649 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:05:40,650 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:05:40,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:05:40,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:05:40,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:05:40,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:05:40" (1/1) ... [2020-08-18 21:05:40,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d85ba32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40, skipping insertion in model container [2020-08-18 21:05:40,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:05:40" (1/1) ... [2020-08-18 21:05:40,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:05:40,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:05:40,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:05:40,887 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:05:40,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:05:40,919 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:05:40,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40 WrapperNode [2020-08-18 21:05:40,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:05:40,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:05:40,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:05:40,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:05:40,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40" (1/1) ... [2020-08-18 21:05:40,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40" (1/1) ... [2020-08-18 21:05:41,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40" (1/1) ... [2020-08-18 21:05:41,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40" (1/1) ... [2020-08-18 21:05:41,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40" (1/1) ... [2020-08-18 21:05:41,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40" (1/1) ... [2020-08-18 21:05:41,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40" (1/1) ... [2020-08-18 21:05:41,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:05:41,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:05:41,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:05:41,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:05:41,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40" (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 21:05:41,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:05:41,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:05:41,109 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-18 21:05:41,109 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-18 21:05:41,110 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:05:41,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:05:41,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:05:41,110 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-18 21:05:41,110 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-18 21:05:41,110 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:05:41,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:05:41,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:05:41,308 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:05:41,309 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 21:05:41,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:05:41 BoogieIcfgContainer [2020-08-18 21:05:41,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:05:41,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:05:41,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:05:41,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:05:41,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:05:40" (1/3) ... [2020-08-18 21:05:41,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8df82cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:05:41, skipping insertion in model container [2020-08-18 21:05:41,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:05:40" (2/3) ... [2020-08-18 21:05:41,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8df82cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:05:41, skipping insertion in model container [2020-08-18 21:05:41,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:05:41" (3/3) ... [2020-08-18 21:05:41,323 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-2.c [2020-08-18 21:05:41,337 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:05:41,349 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:05:41,370 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:05:41,402 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:05:41,402 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:05:41,403 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:05:41,403 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:05:41,403 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:05:41,403 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:05:41,404 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:05:41,404 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:05:41,429 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-18 21:05:41,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 21:05:41,437 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:41,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:41,439 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:41,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:41,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-18 21:05:41,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:41,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231681490] [2020-08-18 21:05:41,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:41,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:41,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:41,655 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 21:05:41,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231681490] [2020-08-18 21:05:41,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:05:41,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:05:41,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827681761] [2020-08-18 21:05:41,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:05:41,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:41,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:05:41,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:05:41,683 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-18 21:05:41,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:41,806 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-18 21:05:41,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:05:41,808 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 21:05:41,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:41,819 INFO L225 Difference]: With dead ends: 44 [2020-08-18 21:05:41,820 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 21:05:41,824 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 21:05:41,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 21:05:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 21:05:41,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 21:05:41,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-18 21:05:41,875 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-18 21:05:41,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:41,876 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-18 21:05:41,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:05:41,876 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-18 21:05:41,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 21:05:41,878 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:41,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:41,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:05:41,880 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:41,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:41,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-18 21:05:41,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:41,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872558969] [2020-08-18 21:05:41,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:41,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:41,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:41,974 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 21:05:41,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872558969] [2020-08-18 21:05:41,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:05:41,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:05:41,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749449591] [2020-08-18 21:05:41,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:05:41,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:41,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:05:41,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:05:41,980 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-18 21:05:42,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:42,061 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-18 21:05:42,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:05:42,062 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 21:05:42,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:42,064 INFO L225 Difference]: With dead ends: 36 [2020-08-18 21:05:42,064 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 21:05:42,066 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 21:05:42,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 21:05:42,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 21:05:42,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 21:05:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-18 21:05:42,076 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-18 21:05:42,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:42,076 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-18 21:05:42,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:05:42,077 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-18 21:05:42,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 21:05:42,078 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:42,078 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 21:05:42,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:05:42,079 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:42,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:42,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-18 21:05:42,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:42,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606435090] [2020-08-18 21:05:42,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:05:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,258 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 21:05:42,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606435090] [2020-08-18 21:05:42,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:42,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 21:05:42,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048857704] [2020-08-18 21:05:42,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:05:42,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:42,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:05:42,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:05:42,266 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-18 21:05:42,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:42,392 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-18 21:05:42,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 21:05:42,393 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-18 21:05:42,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:42,395 INFO L225 Difference]: With dead ends: 58 [2020-08-18 21:05:42,395 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 21:05:42,397 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 21:05:42,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 21:05:42,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-18 21:05:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 21:05:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-18 21:05:42,419 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-18 21:05:42,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:42,420 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-18 21:05:42,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:05:42,420 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-18 21:05:42,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 21:05:42,425 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:42,425 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 21:05:42,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:05:42,426 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:42,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:42,427 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-18 21:05:42,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:42,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174879635] [2020-08-18 21:05:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,596 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 21:05:42,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174879635] [2020-08-18 21:05:42,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:42,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 21:05:42,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578553320] [2020-08-18 21:05:42,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:05:42,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:42,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:05:42,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:05:42,600 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-18 21:05:42,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:42,817 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-18 21:05:42,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:05:42,818 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-18 21:05:42,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:42,821 INFO L225 Difference]: With dead ends: 54 [2020-08-18 21:05:42,821 INFO L226 Difference]: Without dead ends: 50 [2020-08-18 21:05:42,822 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 21:05:42,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-18 21:05:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-18 21:05:42,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 21:05:42,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-18 21:05:42,835 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-18 21:05:42,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:42,836 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-18 21:05:42,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:05:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-18 21:05:42,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-18 21:05:42,838 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:42,839 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 21:05:42,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:05:42,839 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:42,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:42,840 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-18 21:05:42,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:42,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409328031] [2020-08-18 21:05:42,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:05:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 21:05:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:42,956 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 21:05:42,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409328031] [2020-08-18 21:05:42,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:42,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 21:05:42,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964976428] [2020-08-18 21:05:42,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:05:42,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:42,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:05:42,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:05:42,959 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-18 21:05:43,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:43,043 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-18 21:05:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:05:43,044 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-18 21:05:43,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:43,046 INFO L225 Difference]: With dead ends: 94 [2020-08-18 21:05:43,046 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 21:05:43,048 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 21:05:43,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 21:05:43,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-18 21:05:43,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-18 21:05:43,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-18 21:05:43,060 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-18 21:05:43,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:43,060 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-18 21:05:43,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:05:43,061 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-18 21:05:43,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 21:05:43,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:43,063 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 21:05:43,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:05:43,064 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:43,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:43,064 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-18 21:05:43,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:43,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098920627] [2020-08-18 21:05:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,261 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 21:05:43,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098920627] [2020-08-18 21:05:43,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:43,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 21:05:43,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365407207] [2020-08-18 21:05:43,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:05:43,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:43,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:05:43,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:05:43,265 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-18 21:05:43,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:43,409 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-18 21:05:43,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 21:05:43,411 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-18 21:05:43,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:43,415 INFO L225 Difference]: With dead ends: 103 [2020-08-18 21:05:43,415 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 21:05:43,417 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 21:05:43,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 21:05:43,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-18 21:05:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 21:05:43,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-18 21:05:43,429 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-18 21:05:43,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:43,430 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-18 21:05:43,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:05:43,430 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-18 21:05:43,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 21:05:43,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:43,433 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 21:05:43,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:05:43,433 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:43,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:43,434 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-18 21:05:43,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:43,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464133101] [2020-08-18 21:05:43,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,561 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 21:05:43,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464133101] [2020-08-18 21:05:43,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:43,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 21:05:43,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148434756] [2020-08-18 21:05:43,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:05:43,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:43,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:05:43,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:05:43,564 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-18 21:05:43,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:43,801 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-18 21:05:43,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:05:43,802 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-18 21:05:43,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:43,804 INFO L225 Difference]: With dead ends: 86 [2020-08-18 21:05:43,804 INFO L226 Difference]: Without dead ends: 82 [2020-08-18 21:05:43,807 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 21:05:43,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-18 21:05:43,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-18 21:05:43,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 21:05:43,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-18 21:05:43,832 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-18 21:05:43,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:43,832 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-18 21:05:43,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:05:43,833 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-18 21:05:43,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 21:05:43,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:43,836 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 21:05:43,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:05:43,837 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:43,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:43,837 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-18 21:05:43,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:43,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443724876] [2020-08-18 21:05:43,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:43,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 21:05:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:43,996 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 21:05:43,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443724876] [2020-08-18 21:05:43,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:43,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 21:05:43,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945748437] [2020-08-18 21:05:43,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:05:43,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:43,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:05:43,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:05:43,999 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-18 21:05:44,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:44,128 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-18 21:05:44,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:05:44,129 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-18 21:05:44,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:44,131 INFO L225 Difference]: With dead ends: 167 [2020-08-18 21:05:44,131 INFO L226 Difference]: Without dead ends: 94 [2020-08-18 21:05:44,133 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 21:05:44,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-18 21:05:44,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-18 21:05:44,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-18 21:05:44,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-18 21:05:44,149 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-18 21:05:44,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:44,150 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-18 21:05:44,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:05:44,150 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-18 21:05:44,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 21:05:44,152 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:44,152 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 21:05:44,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:05:44,153 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:44,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:44,153 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-18 21:05:44,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:44,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381148842] [2020-08-18 21:05:44,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,379 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 21:05:44,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381148842] [2020-08-18 21:05:44,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:44,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:05:44,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235529507] [2020-08-18 21:05:44,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:05:44,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:44,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:05:44,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:05:44,384 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-18 21:05:44,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:44,617 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-18 21:05:44,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 21:05:44,617 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-18 21:05:44,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:44,620 INFO L225 Difference]: With dead ends: 188 [2020-08-18 21:05:44,620 INFO L226 Difference]: Without dead ends: 109 [2020-08-18 21:05:44,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:05:44,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-18 21:05:44,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-18 21:05:44,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-18 21:05:44,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-18 21:05:44,646 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-18 21:05:44,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:44,647 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-18 21:05:44,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:05:44,647 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-18 21:05:44,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-18 21:05:44,649 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:44,649 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 21:05:44,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:05:44,650 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:44,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:44,650 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-18 21:05:44,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:44,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600211609] [2020-08-18 21:05:44,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:44,923 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 21:05:44,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600211609] [2020-08-18 21:05:44,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:44,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 21:05:44,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737144598] [2020-08-18 21:05:44,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 21:05:44,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:44,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 21:05:44,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-18 21:05:44,926 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-18 21:05:45,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:45,340 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-18 21:05:45,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 21:05:45,342 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-18 21:05:45,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:45,344 INFO L225 Difference]: With dead ends: 199 [2020-08-18 21:05:45,346 INFO L226 Difference]: Without dead ends: 86 [2020-08-18 21:05:45,348 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 21:05:45,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-18 21:05:45,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2020-08-18 21:05:45,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-18 21:05:45,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2020-08-18 21:05:45,362 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 82 [2020-08-18 21:05:45,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:45,362 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2020-08-18 21:05:45,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 21:05:45,363 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2020-08-18 21:05:45,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-18 21:05:45,366 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:45,366 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 21:05:45,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:05:45,367 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:45,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:45,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 2 times [2020-08-18 21:05:45,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:45,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929158333] [2020-08-18 21:05:45,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 21:05:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,657 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 21:05:45,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929158333] [2020-08-18 21:05:45,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:45,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:05:45,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744441715] [2020-08-18 21:05:45,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:05:45,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:45,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:05:45,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:05:45,673 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand 10 states. [2020-08-18 21:05:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:45,882 INFO L93 Difference]: Finished difference Result 142 states and 204 transitions. [2020-08-18 21:05:45,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 21:05:45,882 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2020-08-18 21:05:45,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:45,884 INFO L225 Difference]: With dead ends: 142 [2020-08-18 21:05:45,884 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 21:05:45,885 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 21:05:45,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 21:05:45,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-18 21:05:45,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-18 21:05:45,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2020-08-18 21:05:45,894 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 110 [2020-08-18 21:05:45,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:45,895 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2020-08-18 21:05:45,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:05:45,895 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2020-08-18 21:05:45,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-18 21:05:45,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:45,898 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:45,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:05:45,898 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:45,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:45,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1263382818, now seen corresponding path program 3 times [2020-08-18 21:05:45,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:45,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639647721] [2020-08-18 21:05:45,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:45,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 21:05:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 21:05:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 21:05:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 133 proven. 373 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2020-08-18 21:05:46,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639647721] [2020-08-18 21:05:46,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:46,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 21:05:46,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577887520] [2020-08-18 21:05:46,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 21:05:46,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:46,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 21:05:46,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-08-18 21:05:46,388 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 15 states. [2020-08-18 21:05:47,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:47,012 INFO L93 Difference]: Finished difference Result 184 states and 282 transitions. [2020-08-18 21:05:47,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 21:05:47,013 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 192 [2020-08-18 21:05:47,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:47,015 INFO L225 Difference]: With dead ends: 184 [2020-08-18 21:05:47,015 INFO L226 Difference]: Without dead ends: 111 [2020-08-18 21:05:47,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2020-08-18 21:05:47,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-18 21:05:47,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2020-08-18 21:05:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-18 21:05:47,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2020-08-18 21:05:47,028 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 192 [2020-08-18 21:05:47,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:47,028 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2020-08-18 21:05:47,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 21:05:47,029 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2020-08-18 21:05:47,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-18 21:05:47,031 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:47,031 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:47,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 21:05:47,032 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:47,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:47,032 INFO L82 PathProgramCache]: Analyzing trace with hash -2102107778, now seen corresponding path program 1 times [2020-08-18 21:05:47,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:47,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981248972] [2020-08-18 21:05:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 21:05:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 21:05:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 109 proven. 85 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-08-18 21:05:47,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981248972] [2020-08-18 21:05:47,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:47,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 21:05:47,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887319305] [2020-08-18 21:05:47,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 21:05:47,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:47,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 21:05:47,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-18 21:05:47,312 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand 11 states. [2020-08-18 21:05:47,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:47,580 INFO L93 Difference]: Finished difference Result 188 states and 266 transitions. [2020-08-18 21:05:47,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 21:05:47,581 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136 [2020-08-18 21:05:47,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:47,583 INFO L225 Difference]: With dead ends: 188 [2020-08-18 21:05:47,583 INFO L226 Difference]: Without dead ends: 101 [2020-08-18 21:05:47,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-18 21:05:47,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-18 21:05:47,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2020-08-18 21:05:47,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-18 21:05:47,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 130 transitions. [2020-08-18 21:05:47,595 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 130 transitions. Word has length 136 [2020-08-18 21:05:47,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:47,595 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 130 transitions. [2020-08-18 21:05:47,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 21:05:47,595 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 130 transitions. [2020-08-18 21:05:47,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-18 21:05:47,599 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:47,599 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:47,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 21:05:47,600 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:47,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:47,600 INFO L82 PathProgramCache]: Analyzing trace with hash 677703633, now seen corresponding path program 2 times [2020-08-18 21:05:47,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:47,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836458822] [2020-08-18 21:05:47,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 21:05:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 21:05:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:47,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 138 proven. 250 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2020-08-18 21:05:48,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836458822] [2020-08-18 21:05:48,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:48,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 21:05:48,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637222744] [2020-08-18 21:05:48,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 21:05:48,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:48,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 21:05:48,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:05:48,105 INFO L87 Difference]: Start difference. First operand 98 states and 130 transitions. Second operand 14 states. [2020-08-18 21:05:48,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:48,662 INFO L93 Difference]: Finished difference Result 217 states and 326 transitions. [2020-08-18 21:05:48,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 21:05:48,662 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 177 [2020-08-18 21:05:48,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:48,665 INFO L225 Difference]: With dead ends: 217 [2020-08-18 21:05:48,665 INFO L226 Difference]: Without dead ends: 124 [2020-08-18 21:05:48,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2020-08-18 21:05:48,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-18 21:05:48,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2020-08-18 21:05:48,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-18 21:05:48,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 144 transitions. [2020-08-18 21:05:48,684 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 144 transitions. Word has length 177 [2020-08-18 21:05:48,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:48,685 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 144 transitions. [2020-08-18 21:05:48,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 21:05:48,685 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 144 transitions. [2020-08-18 21:05:48,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-18 21:05:48,688 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:48,688 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:48,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 21:05:48,689 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:48,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:48,689 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 3 times [2020-08-18 21:05:48,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:48,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362884736] [2020-08-18 21:05:48,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:05:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:05:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:05:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 21:05:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 21:05:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:48,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 21:05:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:05:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:05:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:05:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 144 proven. 139 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-08-18 21:05:49,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362884736] [2020-08-18 21:05:49,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:05:49,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 21:05:49,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086633753] [2020-08-18 21:05:49,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 21:05:49,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:05:49,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 21:05:49,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:05:49,073 INFO L87 Difference]: Start difference. First operand 107 states and 144 transitions. Second operand 14 states. [2020-08-18 21:05:49,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:05:49,524 INFO L93 Difference]: Finished difference Result 211 states and 302 transitions. [2020-08-18 21:05:49,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 21:05:49,524 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 150 [2020-08-18 21:05:49,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:05:49,526 INFO L225 Difference]: With dead ends: 211 [2020-08-18 21:05:49,527 INFO L226 Difference]: Without dead ends: 114 [2020-08-18 21:05:49,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-08-18 21:05:49,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-18 21:05:49,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-08-18 21:05:49,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-18 21:05:49,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 147 transitions. [2020-08-18 21:05:49,542 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 147 transitions. Word has length 150 [2020-08-18 21:05:49,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:05:49,543 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 147 transitions. [2020-08-18 21:05:49,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 21:05:49,543 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 147 transitions. [2020-08-18 21:05:49,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-18 21:05:49,546 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:05:49,546 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:05:49,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 21:05:49,547 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:05:49,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:05:49,547 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 4 times [2020-08-18 21:05:49,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:05:49,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889115206] [2020-08-18 21:05:49,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:05:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 21:05:49,583 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 21:05:49,585 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 21:05:49,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 21:05:49,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:05:49 BoogieIcfgContainer [2020-08-18 21:05:49,635 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:05:49,637 INFO L168 Benchmark]: Toolchain (without parser) took 8986.16 ms. Allocated memory was 135.8 MB in the beginning and 396.9 MB in the end (delta: 261.1 MB). Free memory was 99.4 MB in the beginning and 250.4 MB in the end (delta: -151.0 MB). Peak memory consumption was 110.1 MB. Max. memory is 7.1 GB. [2020-08-18 21:05:49,638 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 135.8 MB. Free memory was 117.3 MB in the beginning and 117.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 21:05:49,640 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.51 ms. Allocated memory is still 135.8 MB. Free memory was 99.2 MB in the beginning and 89.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-18 21:05:49,647 INFO L168 Benchmark]: Boogie Preprocessor took 124.77 ms. Allocated memory was 135.8 MB in the beginning and 198.7 MB in the end (delta: 62.9 MB). Free memory was 89.1 MB in the beginning and 177.3 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-18 21:05:49,647 INFO L168 Benchmark]: RCFGBuilder took 268.61 ms. Allocated memory is still 198.7 MB. Free memory was 177.3 MB in the beginning and 164.2 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-18 21:05:49,648 INFO L168 Benchmark]: TraceAbstraction took 8319.38 ms. Allocated memory was 198.7 MB in the beginning and 396.9 MB in the end (delta: 198.2 MB). Free memory was 163.4 MB in the beginning and 250.4 MB in the end (delta: -86.9 MB). Peak memory consumption was 111.3 MB. Max. memory is 7.1 GB. [2020-08-18 21:05:49,655 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 135.8 MB. Free memory was 117.3 MB in the beginning and 117.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 268.51 ms. Allocated memory is still 135.8 MB. Free memory was 99.2 MB in the beginning and 89.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.77 ms. Allocated memory was 135.8 MB in the beginning and 198.7 MB in the end (delta: 62.9 MB). Free memory was 89.1 MB in the beginning and 177.3 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 268.61 ms. Allocated memory is still 198.7 MB. Free memory was 177.3 MB in the beginning and 164.2 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8319.38 ms. Allocated memory was 198.7 MB in the beginning and 396.9 MB in the end (delta: 198.2 MB). Free memory was 163.4 MB in the beginning and 250.4 MB in the end (delta: -86.9 MB). Peak memory consumption was 111.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 6; [L37] CALL, EXPR fibo1(x) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 8 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.1s, OverallIterations: 16, TraceHistogramMax: 17, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 460 SDtfs, 472 SDslu, 2192 SDs, 0 SdLazy, 2617 SolverSat, 338 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 569 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 77 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 1333 NumberOfCodeBlocks, 1333 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1141 ConstructedInterpolants, 0 QuantifiedInterpolants, 236129 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 2308/3324 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...