/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/loop-simple/nested_2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:08:52,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:08:52,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:08:52,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-01-06 17:08:52,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:08:52,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:08:52,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:08:52,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:08:52,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:08:52,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:08:52,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:08:52,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:08:52,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:08:52,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:08:52,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:08:52,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:08:52,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:08:52,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:08:52,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:08:52,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:08:52,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:08:52,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:08:52,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:08:52,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:08:52,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:08:52,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:08:52,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:08:52,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:08:52,551 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:08:52,600 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:08:52,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:08:52,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:08:52,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:08:52,605 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:08:52,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:08:52,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:08:52,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:08:52,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:08:52,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:08:52,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:08:52,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:08:52,608 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:08:52,608 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:08:52,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:08:52,609 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:08:52,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:08:52,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:08:52,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:08:52,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:08:52,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:08:52,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:08:52,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:08:52,611 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:08:52,611 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:08:52,611 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:08:53,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:08:53,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:08:53,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:08:53,065 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:08:53,066 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:08:53,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/nested_2.c [2021-01-06 17:08:53,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6b4a83356/9c82523b867446fda403a800f491e966/FLAGdbb1bd050 [2021-01-06 17:08:53,854 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:08:53,855 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_2.c [2021-01-06 17:08:53,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6b4a83356/9c82523b867446fda403a800f491e966/FLAGdbb1bd050 [2021-01-06 17:08:54,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6b4a83356/9c82523b867446fda403a800f491e966 [2021-01-06 17:08:54,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:08:54,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:08:54,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:08:54,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:08:54,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:08:54,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:08:54" (1/1) ... [2021-01-06 17:08:54,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15c7e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:08:54, skipping insertion in model container [2021-01-06 17:08:54,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:08:54" (1/1) ... [2021-01-06 17:08:54,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:08:54,249 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] [2021-01-06 17:08:54,401 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_2.c[730,743] [2021-01-06 17:08:54,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:08:54,416 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] [2021-01-06 17:08:54,432 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_2.c[730,743] [2021-01-06 17:08:54,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:08:54,448 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:08:54,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:08:54 WrapperNode [2021-01-06 17:08:54,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:08:54,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:08:54,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:08:54,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:08:54,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:08:54" (1/1) ... [2021-01-06 17:08:54,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:08:54" (1/1) ... [2021-01-06 17:08:54,486 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:08:54,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:08:54,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:08:54,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:08:54,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:08:54" (1/1) ... [2021-01-06 17:08:54,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:08:54" (1/1) ... [2021-01-06 17:08:54,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:08:54" (1/1) ... [2021-01-06 17:08:54,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:08:54" (1/1) ... [2021-01-06 17:08:54,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:08:54" (1/1) ... [2021-01-06 17:08:54,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:08:54" (1/1) ... [2021-01-06 17:08:54,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:08:54" (1/1) ... [2021-01-06 17:08:54,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:08:54,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:08:54,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:08:54,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:08:54,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:08:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:08:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:08:54,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:08:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:08:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:08:54,819 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:08:54,819 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-01-06 17:08:54,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:08:54 BoogieIcfgContainer [2021-01-06 17:08:54,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:08:54,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:08:54,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:08:54,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:08:54,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:08:54" (1/3) ... [2021-01-06 17:08:54,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ffd15bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:08:54, skipping insertion in model container [2021-01-06 17:08:54,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:08:54" (2/3) ... [2021-01-06 17:08:54,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ffd15bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:08:54, skipping insertion in model container [2021-01-06 17:08:54,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:08:54" (3/3) ... [2021-01-06 17:08:54,847 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_2.c [2021-01-06 17:08:54,854 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:08:54,858 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 17:08:54,896 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 17:08:54,939 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:08:54,939 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:08:54,940 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:08:54,940 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:08:54,940 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:08:54,941 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:08:54,942 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:08:54,942 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:08:54,961 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2021-01-06 17:08:54,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-01-06 17:08:54,969 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:54,970 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-01-06 17:08:54,971 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:54,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:54,978 INFO L82 PathProgramCache]: Analyzing trace with hash 28697382, now seen corresponding path program 1 times [2021-01-06 17:08:54,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:54,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408323587] [2021-01-06 17:08:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:08:55,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408323587] [2021-01-06 17:08:55,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:08:55,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:08:55,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846322058] [2021-01-06 17:08:55,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:08:55,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:55,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:08:55,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:08:55,304 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2021-01-06 17:08:55,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:55,379 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2021-01-06 17:08:55,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:08:55,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2021-01-06 17:08:55,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:55,407 INFO L225 Difference]: With dead ends: 28 [2021-01-06 17:08:55,408 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 17:08:55,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:08:55,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 17:08:55,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 10. [2021-01-06 17:08:55,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 17:08:55,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-01-06 17:08:55,494 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 5 [2021-01-06 17:08:55,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:55,494 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-01-06 17:08:55,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:08:55,495 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-01-06 17:08:55,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:08:55,495 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:55,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:08:55,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:08:55,496 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:55,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:55,497 INFO L82 PathProgramCache]: Analyzing trace with hash 269344378, now seen corresponding path program 1 times [2021-01-06 17:08:55,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:55,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276575206] [2021-01-06 17:08:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:08:55,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276575206] [2021-01-06 17:08:55,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:08:55,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:08:55,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723951907] [2021-01-06 17:08:55,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:08:55,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:55,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:08:55,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:08:55,544 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2021-01-06 17:08:55,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:55,567 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-01-06 17:08:55,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:08:55,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2021-01-06 17:08:55,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:55,569 INFO L225 Difference]: With dead ends: 19 [2021-01-06 17:08:55,569 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 17:08:55,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:08:55,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 17:08:55,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-01-06 17:08:55,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 17:08:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-01-06 17:08:55,574 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2021-01-06 17:08:55,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:55,575 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-01-06 17:08:55,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:08:55,575 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-01-06 17:08:55,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:08:55,576 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:55,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:08:55,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 17:08:55,577 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:55,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:55,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1485378760, now seen corresponding path program 1 times [2021-01-06 17:08:55,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:55,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652827515] [2021-01-06 17:08:55,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:55,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:08:55,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652827515] [2021-01-06 17:08:55,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935399795] [2021-01-06 17:08:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:08:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:55,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 17:08:55,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:55,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:08:55,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:55,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 17:08:55,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226846158] [2021-01-06 17:08:55,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:08:55,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:55,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:08:55,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:08:55,831 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2021-01-06 17:08:55,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:55,872 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-01-06 17:08:55,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:08:55,873 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-06 17:08:55,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:55,874 INFO L225 Difference]: With dead ends: 22 [2021-01-06 17:08:55,874 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 17:08:55,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:08:55,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 17:08:55,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-01-06 17:08:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 17:08:55,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-01-06 17:08:55,879 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2021-01-06 17:08:55,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:55,879 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-01-06 17:08:55,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:08:55,880 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-01-06 17:08:55,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:08:55,880 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:55,880 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:08:56,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 17:08:56,097 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:56,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:56,099 INFO L82 PathProgramCache]: Analyzing trace with hash 147832950, now seen corresponding path program 2 times [2021-01-06 17:08:56,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:56,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810535262] [2021-01-06 17:08:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:08:56,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810535262] [2021-01-06 17:08:56,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119815232] [2021-01-06 17:08:56,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:08:56,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:08:56,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:56,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 17:08:56,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:08:56,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:56,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 17:08:56,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904261001] [2021-01-06 17:08:56,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:08:56,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:56,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:08:56,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:08:56,270 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2021-01-06 17:08:56,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:56,372 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-01-06 17:08:56,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:08:56,372 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 17:08:56,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:56,374 INFO L225 Difference]: With dead ends: 45 [2021-01-06 17:08:56,374 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 17:08:56,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:08:56,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 17:08:56,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2021-01-06 17:08:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 17:08:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-01-06 17:08:56,385 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 12 [2021-01-06 17:08:56,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:56,385 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-01-06 17:08:56,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:08:56,386 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-01-06 17:08:56,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 17:08:56,387 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:56,387 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1] [2021-01-06 17:08:56,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:08:56,602 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:56,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:56,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1657769242, now seen corresponding path program 3 times [2021-01-06 17:08:56,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:56,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142496891] [2021-01-06 17:08:56,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 17:08:56,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142496891] [2021-01-06 17:08:56,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065362691] [2021-01-06 17:08:56,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:08:56,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:08:56,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:56,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:08:56,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 17:08:56,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:56,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 17:08:56,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356063439] [2021-01-06 17:08:56,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:08:56,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:56,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:08:56,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:08:56,772 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2021-01-06 17:08:56,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:56,809 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-01-06 17:08:56,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:08:56,809 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2021-01-06 17:08:56,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:56,810 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:08:56,811 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:08:56,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:08:56,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:08:56,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-01-06 17:08:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 17:08:56,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-01-06 17:08:56,818 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2021-01-06 17:08:56,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:56,830 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-01-06 17:08:56,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:08:56,833 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-01-06 17:08:56,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 17:08:56,834 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:56,834 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1] [2021-01-06 17:08:57,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:08:57,050 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:57,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:57,051 INFO L82 PathProgramCache]: Analyzing trace with hash 953965478, now seen corresponding path program 4 times [2021-01-06 17:08:57,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:57,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375395704] [2021-01-06 17:08:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 17:08:57,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375395704] [2021-01-06 17:08:57,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677474248] [2021-01-06 17:08:57,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:08:57,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:08:57,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:57,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:08:57,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 17:08:57,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:57,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 17:08:57,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077764539] [2021-01-06 17:08:57,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:08:57,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:57,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:08:57,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:08:57,292 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2021-01-06 17:08:57,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:57,342 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-01-06 17:08:57,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:08:57,342 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2021-01-06 17:08:57,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:57,343 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:08:57,343 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 17:08:57,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:08:57,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 17:08:57,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-01-06 17:08:57,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 17:08:57,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-01-06 17:08:57,354 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2021-01-06 17:08:57,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:57,355 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-01-06 17:08:57,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:08:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-01-06 17:08:57,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 17:08:57,356 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:57,356 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1] [2021-01-06 17:08:57,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:08:57,559 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:57,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:57,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1188152166, now seen corresponding path program 5 times [2021-01-06 17:08:57,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:57,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438412272] [2021-01-06 17:08:57,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 63 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 17:08:57,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438412272] [2021-01-06 17:08:57,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091250577] [2021-01-06 17:08:57,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:08:57,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 17:08:57,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:57,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:08:57,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 63 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 17:08:57,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:57,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 17:08:57,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027847604] [2021-01-06 17:08:57,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:08:57,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:57,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:08:57,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:08:57,808 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2021-01-06 17:08:57,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:57,852 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2021-01-06 17:08:57,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:08:57,853 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2021-01-06 17:08:57,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:57,853 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:08:57,853 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:08:57,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:08:57,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:08:57,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 17:08:57,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 17:08:57,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-01-06 17:08:57,868 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2021-01-06 17:08:57,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:57,868 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-01-06 17:08:57,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:08:57,869 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-01-06 17:08:57,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 17:08:57,870 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:57,870 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1] [2021-01-06 17:08:58,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 17:08:58,086 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:58,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:58,088 INFO L82 PathProgramCache]: Analyzing trace with hash 750610982, now seen corresponding path program 6 times [2021-01-06 17:08:58,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:58,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585036428] [2021-01-06 17:08:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 17:08:58,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585036428] [2021-01-06 17:08:58,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870095345] [2021-01-06 17:08:58,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:08:58,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 17:08:58,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:58,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 17:08:58,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 17:08:58,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:58,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 17:08:58,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137020139] [2021-01-06 17:08:58,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:08:58,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:58,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:08:58,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:08:58,246 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 6 states. [2021-01-06 17:08:58,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:58,266 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-01-06 17:08:58,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:08:58,267 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2021-01-06 17:08:58,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:58,268 INFO L225 Difference]: With dead ends: 68 [2021-01-06 17:08:58,268 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 17:08:58,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:08:58,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 17:08:58,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2021-01-06 17:08:58,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 17:08:58,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2021-01-06 17:08:58,277 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 35 [2021-01-06 17:08:58,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:58,277 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2021-01-06 17:08:58,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:08:58,278 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2021-01-06 17:08:58,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 17:08:58,279 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:58,279 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 3, 1, 1, 1, 1, 1] [2021-01-06 17:08:58,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:08:58,493 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:58,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:58,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1549796206, now seen corresponding path program 7 times [2021-01-06 17:08:58,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:58,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332520212] [2021-01-06 17:08:58,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-01-06 17:08:58,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332520212] [2021-01-06 17:08:58,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049279244] [2021-01-06 17:08:58,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:08:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:58,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:08:58,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-01-06 17:08:58,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:58,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 17:08:58,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94961389] [2021-01-06 17:08:58,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:08:58,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:58,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:08:58,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:08:58,695 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 7 states. [2021-01-06 17:08:58,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:58,721 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2021-01-06 17:08:58,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:08:58,721 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2021-01-06 17:08:58,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:58,722 INFO L225 Difference]: With dead ends: 83 [2021-01-06 17:08:58,722 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 17:08:58,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:08:58,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 17:08:58,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2021-01-06 17:08:58,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 17:08:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-01-06 17:08:58,732 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 50 [2021-01-06 17:08:58,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:58,733 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-01-06 17:08:58,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:08:58,733 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-01-06 17:08:58,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 17:08:58,735 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:58,735 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 4, 4, 4, 1, 1, 1, 1, 1] [2021-01-06 17:08:58,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:08:58,949 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:58,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:58,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1394520358, now seen corresponding path program 8 times [2021-01-06 17:08:58,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:58,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557344028] [2021-01-06 17:08:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 526 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 17:08:59,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557344028] [2021-01-06 17:08:59,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772496944] [2021-01-06 17:08:59,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:08:59,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:08:59,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:59,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:08:59,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:59,159 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 526 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 17:08:59,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:08:59,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 17:08:59,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123354997] [2021-01-06 17:08:59,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:08:59,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:59,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:08:59,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:08:59,162 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 8 states. [2021-01-06 17:08:59,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:59,188 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2021-01-06 17:08:59,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:08:59,189 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2021-01-06 17:08:59,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:59,190 INFO L225 Difference]: With dead ends: 98 [2021-01-06 17:08:59,190 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 17:08:59,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:08:59,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 17:08:59,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 81. [2021-01-06 17:08:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 17:08:59,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-01-06 17:08:59,200 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 65 [2021-01-06 17:08:59,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:59,200 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-01-06 17:08:59,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:08:59,200 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-01-06 17:08:59,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 17:08:59,201 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:08:59,202 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 5, 5, 5, 1, 1, 1, 1, 1] [2021-01-06 17:08:59,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 17:08:59,416 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:08:59,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:08:59,417 INFO L82 PathProgramCache]: Analyzing trace with hash -60302226, now seen corresponding path program 9 times [2021-01-06 17:08:59,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:08:59,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609548973] [2021-01-06 17:08:59,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:08:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:08:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-01-06 17:08:59,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609548973] [2021-01-06 17:08:59,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942585750] [2021-01-06 17:08:59,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:08:59,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-01-06 17:08:59,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:08:59,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:08:59,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:08:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2021-01-06 17:08:59,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:08:59,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-01-06 17:08:59,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172053890] [2021-01-06 17:08:59,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:08:59,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:08:59,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:08:59,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:08:59,934 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 8 states. [2021-01-06 17:08:59,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:08:59,962 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-01-06 17:08:59,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:08:59,963 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2021-01-06 17:08:59,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:08:59,963 INFO L225 Difference]: With dead ends: 81 [2021-01-06 17:08:59,964 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 17:08:59,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:08:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 17:08:59,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 17:08:59,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 17:08:59,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 17:08:59,965 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2021-01-06 17:08:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:08:59,966 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 17:08:59,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:08:59,966 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 17:08:59,966 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 17:09:00,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:09:00,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 17:09:00,311 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 23 [2021-01-06 17:09:00,356 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 17:09:00,357 INFO L189 CegarLoopUtils]: For program point L25-1(lines 25 27) no Hoare annotation was computed. [2021-01-06 17:09:00,357 INFO L189 CegarLoopUtils]: For program point L21-2(lines 21 23) no Hoare annotation was computed. [2021-01-06 17:09:00,357 INFO L185 CegarLoopUtils]: At program point L21-3(lines 21 23) the Hoare annotation is: (and (< ULTIMATE.start_main_~b~0 7) (<= ULTIMATE.start_main_~a~0 5)) [2021-01-06 17:09:00,357 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 17:09:00,357 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 17:09:00,357 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 17:09:00,357 INFO L192 CegarLoopUtils]: At program point L28(lines 15 29) the Hoare annotation is: true [2021-01-06 17:09:00,358 INFO L189 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2021-01-06 17:09:00,358 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 26) no Hoare annotation was computed. [2021-01-06 17:09:00,358 INFO L189 CegarLoopUtils]: For program point L20-2(lines 20 24) no Hoare annotation was computed. [2021-01-06 17:09:00,358 INFO L185 CegarLoopUtils]: At program point L20-3(lines 20 24) the Hoare annotation is: (and (<= ULTIMATE.start_main_~a~0 6) (< ULTIMATE.start_main_~b~0 7) (<= 6 ULTIMATE.start_main_~b~0)) [2021-01-06 17:09:00,358 INFO L189 CegarLoopUtils]: For program point L20-4(lines 15 29) no Hoare annotation was computed. [2021-01-06 17:09:00,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:09:00 BoogieIcfgContainer [2021-01-06 17:09:00,373 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:09:00,374 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:09:00,374 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:09:00,374 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:09:00,375 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:08:54" (3/4) ... [2021-01-06 17:09:00,378 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 17:09:00,387 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-01-06 17:09:00,387 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 17:09:00,388 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 17:09:00,388 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 17:09:00,429 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-simple/nested_2.c-witness.graphml [2021-01-06 17:09:00,429 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:09:00,431 INFO L168 Benchmark]: Toolchain (without parser) took 6211.41 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 133.6 MB in the beginning and 109.9 MB in the end (delta: 23.7 MB). Peak memory consumption was 57.2 MB. Max. memory is 8.0 GB. [2021-01-06 17:09:00,431 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 158.3 MB. Free memory is still 129.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:09:00,432 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.26 ms. Allocated memory is still 158.3 MB. Free memory was 133.4 MB in the beginning and 124.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-01-06 17:09:00,433 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.10 ms. Allocated memory is still 158.3 MB. Free memory was 124.1 MB in the beginning and 122.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:09:00,433 INFO L168 Benchmark]: Boogie Preprocessor took 22.32 ms. Allocated memory is still 158.3 MB. Free memory was 122.7 MB in the beginning and 121.8 MB in the end (delta: 838.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:09:00,434 INFO L168 Benchmark]: RCFGBuilder took 311.14 ms. Allocated memory is still 158.3 MB. Free memory was 121.6 MB in the beginning and 110.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:09:00,435 INFO L168 Benchmark]: TraceAbstraction took 5540.31 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 141.9 MB in the beginning and 112.5 MB in the end (delta: 29.4 MB). Peak memory consumption was 61.9 MB. Max. memory is 8.0 GB. [2021-01-06 17:09:00,435 INFO L168 Benchmark]: Witness Printer took 55.55 ms. Allocated memory is still 190.8 MB. Free memory was 112.5 MB in the beginning and 109.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:09:00,439 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 158.3 MB. Free memory is still 129.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 228.26 ms. Allocated memory is still 158.3 MB. Free memory was 133.4 MB in the beginning and 124.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.10 ms. Allocated memory is still 158.3 MB. Free memory was 124.1 MB in the beginning and 122.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 22.32 ms. Allocated memory is still 158.3 MB. Free memory was 122.7 MB in the beginning and 121.8 MB in the end (delta: 838.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 311.14 ms. Allocated memory is still 158.3 MB. Free memory was 121.6 MB in the beginning and 110.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5540.31 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 141.9 MB in the beginning and 112.5 MB in the end (delta: 29.4 MB). Peak memory consumption was 61.9 MB. Max. memory is 8.0 GB. * Witness Printer took 55.55 ms. Allocated memory is still 190.8 MB. Free memory was 112.5 MB in the beginning and 109.9 MB in the end (delta: 2.6 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: 26]: 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 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (a <= 6 && b < 7) && 6 <= b - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: b < 7 && a <= 5 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.2s, OverallIterations: 11, TraceHistogramMax: 30, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 84 SDtfs, 98 SDslu, 159 SDs, 0 SdLazy, 218 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 393 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred 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, 62 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 45 NumberOfFragments, 18 HoareAnnotationTreeSize, 3 FomulaSimplifications, 1545 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 62 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 679 NumberOfCodeBlocks, 604 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 81577 SizeOfPredicates, 2 NumberOfNonLiveVariables, 634 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 20 InterpolantComputations, 3 PerfectInterpolantSequences, 2269/5009 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...