/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/recursive-simple/sum_10x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:03:59,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:03:59,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:03:59,267 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:03:59,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:03:59,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:03:59,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:03:59,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:03:59,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:03:59,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:03:59,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:03:59,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:03:59,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:03:59,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:03:59,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:03:59,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:03:59,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:03:59,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:03:59,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:03:59,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:03:59,363 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:03:59,429 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:03:59,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:03:59,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:03:59,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:03:59,433 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:03:59,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:03:59,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:03:59,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:03:59,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:03:59,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:03:59,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:03:59,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:03:59,435 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:03:59,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:03:59,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:03:59,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:03:59,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:03:59,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:03:59,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:03:59,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:03:59,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:03:59,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:03:59,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:03:59,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:03:59,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:03:59,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:03:59,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:03:59,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:03:59,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:03:59,977 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:03:59,978 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:03:59,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_10x0-1.c [2020-12-22 07:04:00,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f778cd37/a741fd18dd3e445ab246588c99214d7f/FLAGb4cd155c8 [2020-12-22 07:04:00,818 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:04:00,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_10x0-1.c [2020-12-22 07:04:00,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f778cd37/a741fd18dd3e445ab246588c99214d7f/FLAGb4cd155c8 [2020-12-22 07:04:01,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f778cd37/a741fd18dd3e445ab246588c99214d7f [2020-12-22 07:04:01,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:04:01,171 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:04:01,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:04:01,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:04:01,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:04:01,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:04:01" (1/1) ... [2020-12-22 07:04:01,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1983148a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:01, skipping insertion in model container [2020-12-22 07:04:01,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:04:01" (1/1) ... [2020-12-22 07:04:01,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:04:01,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:04:01,362 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_10x0-1.c[481,494] [2020-12-22 07:04:01,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:04:01,377 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:04:01,391 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_10x0-1.c[481,494] [2020-12-22 07:04:01,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:04:01,407 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:04:01,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:01 WrapperNode [2020-12-22 07:04:01,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:04:01,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:04:01,409 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:04:01,409 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:04:01,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:01" (1/1) ... [2020-12-22 07:04:01,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:01" (1/1) ... [2020-12-22 07:04:01,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:04:01,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:04:01,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:04:01,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:04:01,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:01" (1/1) ... [2020-12-22 07:04:01,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:01" (1/1) ... [2020-12-22 07:04:01,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:01" (1/1) ... [2020-12-22 07:04:01,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:01" (1/1) ... [2020-12-22 07:04:01,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:01" (1/1) ... [2020-12-22 07:04:01,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:01" (1/1) ... [2020-12-22 07:04:01,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:01" (1/1) ... [2020-12-22 07:04:01,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:04:01,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:04:01,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:04:01,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:04:01,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 07:04:01,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:04:01,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:04:01,559 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-12-22 07:04:01,559 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-12-22 07:04:01,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:04:01,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:04:01,818 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:04:01,819 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 07:04:01,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:01 BoogieIcfgContainer [2020-12-22 07:04:01,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:04:01,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:04:01,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:04:01,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:04:01,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:04:01" (1/3) ... [2020-12-22 07:04:01,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d89ded3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:04:01, skipping insertion in model container [2020-12-22 07:04:01,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:01" (2/3) ... [2020-12-22 07:04:01,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d89ded3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:04:01, skipping insertion in model container [2020-12-22 07:04:01,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:01" (3/3) ... [2020-12-22 07:04:01,838 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2020-12-22 07:04:01,848 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:04:01,854 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:04:01,896 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:04:01,945 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:04:01,946 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:04:01,946 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:04:01,946 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:04:01,946 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:04:01,946 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:04:01,946 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:04:01,947 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:04:01,972 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-22 07:04:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 07:04:01,981 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:01,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:01,983 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:01,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:01,991 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2020-12-22 07:04:02,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:02,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930691748] [2020-12-22 07:04:02,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:02,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:04:02,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930691748] [2020-12-22 07:04:02,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:04:02,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:04:02,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557575932] [2020-12-22 07:04:02,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:04:02,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:02,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:04:02,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:04:02,453 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2020-12-22 07:04:02,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:02,548 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-22 07:04:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:04:02,551 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-22 07:04:02,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:02,561 INFO L225 Difference]: With dead ends: 25 [2020-12-22 07:04:02,561 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 07:04:02,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:04:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 07:04:02,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-22 07:04:02,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 07:04:02,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-22 07:04:02,614 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-12-22 07:04:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:02,615 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-22 07:04:02,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:04:02,616 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-22 07:04:02,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 07:04:02,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:02,618 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:02,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:04:02,619 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:02,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:02,620 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2020-12-22 07:04:02,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:02,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048511721] [2020-12-22 07:04:02,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:02,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:02,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:04:02,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048511721] [2020-12-22 07:04:02,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486649134] [2020-12-22 07:04:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:02,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 07:04:02,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:02,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:04:02,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:02,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 07:04:02,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313688604] [2020-12-22 07:04:02,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:04:02,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:02,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:04:02,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:04:02,973 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-12-22 07:04:03,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:03,023 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-22 07:04:03,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:04:03,023 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-22 07:04:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:03,024 INFO L225 Difference]: With dead ends: 22 [2020-12-22 07:04:03,025 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 07:04:03,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:04:03,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 07:04:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 07:04:03,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 07:04:03,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-22 07:04:03,041 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-12-22 07:04:03,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:03,041 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-22 07:04:03,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:04:03,041 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-22 07:04:03,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 07:04:03,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:03,043 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:03,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 07:04:03,257 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:03,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:03,259 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2020-12-22 07:04:03,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:03,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846705632] [2020-12-22 07:04:03,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:03,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:03,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:03,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:04:03,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846705632] [2020-12-22 07:04:03,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131089389] [2020-12-22 07:04:03,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:03,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:04:03,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:03,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 07:04:03,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:04:03,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:03,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 07:04:03,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119639207] [2020-12-22 07:04:03,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:04:03,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:03,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:04:03,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:04:03,569 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-12-22 07:04:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:03,634 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-22 07:04:03,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:04:03,635 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-12-22 07:04:03,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:03,636 INFO L225 Difference]: With dead ends: 25 [2020-12-22 07:04:03,636 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 07:04:03,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:04:03,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 07:04:03,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-22 07:04:03,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 07:04:03,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-22 07:04:03,644 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-12-22 07:04:03,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:03,645 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-22 07:04:03,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:04:03,645 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-22 07:04:03,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 07:04:03,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:03,647 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:03,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:03,862 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:03,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:03,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2020-12-22 07:04:03,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:03,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597200397] [2020-12-22 07:04:03,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:03,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:04,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:04,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:04,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 07:04:04,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597200397] [2020-12-22 07:04:04,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720019738] [2020-12-22 07:04:04,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:04,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 07:04:04,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:04,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 07:04:04,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 07:04:04,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:04,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 07:04:04,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013218748] [2020-12-22 07:04:04,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 07:04:04,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:04,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 07:04:04,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:04:04,262 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-12-22 07:04:04,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:04,324 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-22 07:04:04,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:04:04,325 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-22 07:04:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:04,326 INFO L225 Difference]: With dead ends: 28 [2020-12-22 07:04:04,327 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 07:04:04,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:04:04,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 07:04:04,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 07:04:04,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 07:04:04,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-22 07:04:04,334 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-12-22 07:04:04,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:04,334 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-22 07:04:04,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 07:04:04,334 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-22 07:04:04,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 07:04:04,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:04,336 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:04,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:04,550 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:04,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:04,551 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2020-12-22 07:04:04,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:04,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376207591] [2020-12-22 07:04:04,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:04,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:04,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:04,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:04,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:04,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 07:04:04,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376207591] [2020-12-22 07:04:04,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625419991] [2020-12-22 07:04:04,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:04,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 07:04:04,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:04,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 07:04:04,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 07:04:04,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:04,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 07:04:04,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180560044] [2020-12-22 07:04:04,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 07:04:04,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:04,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 07:04:04,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:04:04,819 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-12-22 07:04:04,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:04,924 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-12-22 07:04:04,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:04:04,925 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-12-22 07:04:04,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:04,926 INFO L225 Difference]: With dead ends: 31 [2020-12-22 07:04:04,927 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 07:04:04,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:04:04,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 07:04:04,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-22 07:04:04,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 07:04:04,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-22 07:04:04,934 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-12-22 07:04:04,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:04,935 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-22 07:04:04,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 07:04:04,935 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-22 07:04:04,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:04:04,936 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:04,936 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:05,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:05,151 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:05,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:05,152 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2020-12-22 07:04:05,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:05,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290951353] [2020-12-22 07:04:05,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:05,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:05,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:05,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:05,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:05,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:05,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-22 07:04:05,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290951353] [2020-12-22 07:04:05,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401202369] [2020-12-22 07:04:05,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:05,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 07:04:05,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:05,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 07:04:05,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-22 07:04:05,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:05,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 07:04:05,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526410467] [2020-12-22 07:04:05,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 07:04:05,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:05,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 07:04:05,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:04:05,533 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-12-22 07:04:05,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:05,684 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-22 07:04:05,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:04:05,684 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-12-22 07:04:05,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:05,687 INFO L225 Difference]: With dead ends: 34 [2020-12-22 07:04:05,687 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 07:04:05,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:04:05,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 07:04:05,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-22 07:04:05,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 07:04:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-22 07:04:05,707 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-12-22 07:04:05,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:05,708 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-22 07:04:05,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 07:04:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-22 07:04:05,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 07:04:05,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:05,712 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:05,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 07:04:05,913 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:05,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:05,914 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2020-12-22 07:04:05,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:05,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213946888] [2020-12-22 07:04:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:05,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:06,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:06,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:06,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:06,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:06,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:06,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-22 07:04:06,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213946888] [2020-12-22 07:04:06,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902531673] [2020-12-22 07:04:06,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:06,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 07:04:06,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:06,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 07:04:06,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-22 07:04:06,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:06,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 07:04:06,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015798182] [2020-12-22 07:04:06,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 07:04:06,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:06,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 07:04:06,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:04:06,445 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-12-22 07:04:06,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:06,552 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-12-22 07:04:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 07:04:06,553 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-12-22 07:04:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:06,554 INFO L225 Difference]: With dead ends: 37 [2020-12-22 07:04:06,554 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 07:04:06,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-12-22 07:04:06,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 07:04:06,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-22 07:04:06,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 07:04:06,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-22 07:04:06,561 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-12-22 07:04:06,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:06,562 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-22 07:04:06,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 07:04:06,562 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-22 07:04:06,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 07:04:06,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:06,564 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:06,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:06,778 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:06,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:06,779 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2020-12-22 07:04:06,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:06,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169470287] [2020-12-22 07:04:06,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:06,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:06,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:06,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:06,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:06,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:06,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:06,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:07,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-22 07:04:07,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169470287] [2020-12-22 07:04:07,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546321978] [2020-12-22 07:04:07,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:07,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 07:04:07,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-22 07:04:07,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:07,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 07:04:07,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859147161] [2020-12-22 07:04:07,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 07:04:07,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:07,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 07:04:07,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:04:07,281 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-12-22 07:04:07,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:07,419 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-12-22 07:04:07,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 07:04:07,420 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-12-22 07:04:07,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:07,421 INFO L225 Difference]: With dead ends: 40 [2020-12-22 07:04:07,421 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 07:04:07,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-12-22 07:04:07,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 07:04:07,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-22 07:04:07,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 07:04:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-22 07:04:07,428 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-12-22 07:04:07,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:07,429 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-22 07:04:07,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 07:04:07,429 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-22 07:04:07,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 07:04:07,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:07,430 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:07,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:07,645 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:07,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:07,646 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2020-12-22 07:04:07,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:07,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441109208] [2020-12-22 07:04:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:07,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:07,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:07,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:07,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:07,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:07,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:07,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:07,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:07,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 07:04:07,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441109208] [2020-12-22 07:04:07,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639246235] [2020-12-22 07:04:07,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:08,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:04:08,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:08,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 07:04:08,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 07:04:08,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:08,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 07:04:08,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179667098] [2020-12-22 07:04:08,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 07:04:08,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:08,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 07:04:08,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-22 07:04:08,152 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-12-22 07:04:08,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:08,310 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-12-22 07:04:08,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 07:04:08,310 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-12-22 07:04:08,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:08,318 INFO L225 Difference]: With dead ends: 43 [2020-12-22 07:04:08,318 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 07:04:08,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-12-22 07:04:08,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 07:04:08,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-22 07:04:08,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 07:04:08,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-22 07:04:08,329 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-12-22 07:04:08,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:08,329 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-22 07:04:08,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 07:04:08,330 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-22 07:04:08,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 07:04:08,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:08,331 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:08,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 07:04:08,546 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:08,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:08,547 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2020-12-22 07:04:08,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:08,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623961219] [2020-12-22 07:04:08,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:08,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:08,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:08,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:08,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:08,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:08,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:08,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:08,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:08,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:08,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-22 07:04:08,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623961219] [2020-12-22 07:04:08,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278974660] [2020-12-22 07:04:08,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:08,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 07:04:08,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:08,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 07:04:09,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-22 07:04:09,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:09,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 07:04:09,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381800575] [2020-12-22 07:04:09,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 07:04:09,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:09,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 07:04:09,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:04:09,181 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-12-22 07:04:09,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:09,344 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-12-22 07:04:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 07:04:09,345 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-12-22 07:04:09,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:09,346 INFO L225 Difference]: With dead ends: 46 [2020-12-22 07:04:09,346 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 07:04:09,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-12-22 07:04:09,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 07:04:09,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-22 07:04:09,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 07:04:09,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-22 07:04:09,353 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-12-22 07:04:09,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:09,353 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-22 07:04:09,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 07:04:09,354 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-22 07:04:09,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:04:09,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:09,358 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:09,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:09,568 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:09,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:09,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2020-12-22 07:04:09,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:09,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281124236] [2020-12-22 07:04:09,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:09,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:09,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:09,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:10,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:10,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:10,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:10,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:10,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:10,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:10,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:10,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:10,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 144 proven. 20 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-22 07:04:10,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281124236] [2020-12-22 07:04:10,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205168960] [2020-12-22 07:04:10,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:10,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 07:04:10,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:10,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 97 conjunts are in the unsatisfiable core [2020-12-22 07:04:10,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 19 proven. 155 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-12-22 07:04:12,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:12,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 54 [2020-12-22 07:04:12,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492967660] [2020-12-22 07:04:12,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 07:04:12,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:12,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 07:04:12,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2657, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 07:04:12,237 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 54 states. [2020-12-22 07:04:14,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:14,882 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-12-22 07:04:14,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 07:04:14,883 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 70 [2020-12-22 07:04:14,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:14,883 INFO L225 Difference]: With dead ends: 45 [2020-12-22 07:04:14,884 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 07:04:14,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=535, Invalid=5785, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 07:04:14,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 07:04:14,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 07:04:14,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 07:04:14,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 07:04:14,890 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 70 [2020-12-22 07:04:14,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:14,890 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 07:04:14,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 07:04:14,890 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 07:04:14,890 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 07:04:15,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:15,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 07:04:15,133 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-22 07:04:15,134 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-22 07:04:15,134 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-22 07:04:15,134 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-22 07:04:15,134 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2020-12-22 07:04:15,134 INFO L189 CegarLoopUtils]: For program point L18(line 18) no Hoare annotation was computed. [2020-12-22 07:04:15,134 INFO L189 CegarLoopUtils]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-12-22 07:04:15,134 INFO L185 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (and (= ULTIMATE.start_main_~a~0 10) (= ULTIMATE.start_main_~b~0 0)) [2020-12-22 07:04:15,135 INFO L189 CegarLoopUtils]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-12-22 07:04:15,135 INFO L189 CegarLoopUtils]: For program point L13(lines 13 20) no Hoare annotation was computed. [2020-12-22 07:04:15,135 INFO L189 CegarLoopUtils]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2020-12-22 07:04:15,135 INFO L185 CegarLoopUtils]: At program point L9(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (<= 1 sum_~n) (= sum_~m |sum_#in~m|)) [2020-12-22 07:04:15,135 INFO L189 CegarLoopUtils]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-12-22 07:04:15,135 INFO L189 CegarLoopUtils]: For program point L6(lines 6 10) no Hoare annotation was computed. [2020-12-22 07:04:15,135 INFO L189 CegarLoopUtils]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2020-12-22 07:04:15,135 INFO L192 CegarLoopUtils]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2020-12-22 07:04:15,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 07:04:15 BoogieIcfgContainer [2020-12-22 07:04:15,150 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 07:04:15,151 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 07:04:15,151 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 07:04:15,152 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 07:04:15,153 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:01" (3/4) ... [2020-12-22 07:04:15,157 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 07:04:15,166 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2020-12-22 07:04:15,174 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-22 07:04:15,174 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-22 07:04:15,174 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 07:04:15,175 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 07:04:15,224 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/sum_10x0-1.c-witness.graphml [2020-12-22 07:04:15,224 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 07:04:15,226 INFO L168 Benchmark]: Toolchain (without parser) took 14054.25 ms. Allocated memory was 155.2 MB in the beginning and 269.5 MB in the end (delta: 114.3 MB). Free memory was 130.7 MB in the beginning and 123.0 MB in the end (delta: 7.7 MB). Peak memory consumption was 123.3 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:15,227 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 155.2 MB. Free memory is still 127.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 07:04:15,227 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.88 ms. Allocated memory is still 155.2 MB. Free memory was 130.5 MB in the beginning and 121.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:15,228 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.19 ms. Allocated memory is still 155.2 MB. Free memory was 121.4 MB in the beginning and 120.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:15,228 INFO L168 Benchmark]: Boogie Preprocessor took 18.61 ms. Allocated memory is still 155.2 MB. Free memory was 120.1 MB in the beginning and 119.2 MB in the end (delta: 861.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:15,229 INFO L168 Benchmark]: RCFGBuilder took 360.85 ms. Allocated memory is still 155.2 MB. Free memory was 119.2 MB in the beginning and 107.6 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:15,229 INFO L168 Benchmark]: TraceAbstraction took 13325.25 ms. Allocated memory was 155.2 MB in the beginning and 269.5 MB in the end (delta: 114.3 MB). Free memory was 107.1 MB in the beginning and 125.1 MB in the end (delta: -18.0 MB). Peak memory consumption was 97.1 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:15,230 INFO L168 Benchmark]: Witness Printer took 73.16 ms. Allocated memory is still 269.5 MB. Free memory was 125.1 MB in the beginning and 123.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:15,235 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 155.2 MB. Free memory is still 127.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 234.88 ms. Allocated memory is still 155.2 MB. Free memory was 130.5 MB in the beginning and 121.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 33.19 ms. Allocated memory is still 155.2 MB. Free memory was 121.4 MB in the beginning and 120.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.61 ms. Allocated memory is still 155.2 MB. Free memory was 120.1 MB in the beginning and 119.2 MB in the end (delta: 861.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 360.85 ms. Allocated memory is still 155.2 MB. Free memory was 119.2 MB in the beginning and 107.6 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13325.25 ms. Allocated memory was 155.2 MB in the beginning and 269.5 MB in the end (delta: 114.3 MB). Free memory was 107.1 MB in the beginning and 125.1 MB in the end (delta: -18.0 MB). Peak memory consumption was 97.1 MB. Max. memory is 8.0 GB. * Witness Printer took 73.16 ms. Allocated memory is still 269.5 MB. Free memory was 125.1 MB in the beginning and 123.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.1s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 108 SDtfs, 303 SDslu, 768 SDs, 0 SdLazy, 1331 SolverSat, 161 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 745 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 870 NumberOfCodeBlocks, 864 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 849 ConstructedInterpolants, 0 QuantifiedInterpolants, 148422 SizeOfPredicates, 79 NumberOfNonLiveVariables, 1511 ConjunctsInSsa, 223 ConjunctsInUnsatCore, 21 InterpolantComputations, 1 PerfectInterpolantSequences, 1345/2420 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...