/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-invgen/up.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:56:16,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:56:16,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:56:16,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-23 06:56:16,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:56:16,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:56:16,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:56:16,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:56:16,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:56:16,695 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:56:16,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:56:16,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:56:16,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:56:16,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:56:16,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:56:16,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:56:16,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:56:16,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:56:16,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:56:16,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:56:16,740 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:56:16,769 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:56:16,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:56:16,771 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:56:16,772 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:56:16,772 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:56:16,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:56:16,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:56:16,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:56:16,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:56:16,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:56:16,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:56:16,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:56:16,774 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:56:16,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:56:16,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:56:16,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:56:16,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:56:16,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:56:16,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:56:16,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:56:16,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:56:16,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:56:16,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:56:16,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:56:16,778 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:56:16,778 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:56:17,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:56:17,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:56:17,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:56:17,260 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:56:17,261 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:56:17,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/up.i [2020-12-23 06:56:17,344 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/252196ed0/c0a6f07eeffc4720844e3f56055e7af4/FLAGd3f2ae21a [2020-12-23 06:56:17,904 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:56:17,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-invgen/up.i [2020-12-23 06:56:17,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/252196ed0/c0a6f07eeffc4720844e3f56055e7af4/FLAGd3f2ae21a [2020-12-23 06:56:18,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/252196ed0/c0a6f07eeffc4720844e3f56055e7af4 [2020-12-23 06:56:18,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:56:18,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:56:18,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:56:18,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:56:18,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:56:18,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:56:18" (1/1) ... [2020-12-23 06:56:18,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f7dfa81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:18, skipping insertion in model container [2020-12-23 06:56:18,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:56:18" (1/1) ... [2020-12-23 06:56:18,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:56:18,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:56:18,475 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-invgen/up.i[893,906] left hand side expression in assignment: lhs: VariableLHS[~n~0,] [2020-12-23 06:56:18,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:56:18,498 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:56:18,513 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-invgen/up.i[893,906] left hand side expression in assignment: lhs: VariableLHS[~n~0,] [2020-12-23 06:56:18,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:56:18,532 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:56:18,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:18 WrapperNode [2020-12-23 06:56:18,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:56:18,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:56:18,534 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:56:18,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:56:18,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:18" (1/1) ... [2020-12-23 06:56:18,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:18" (1/1) ... [2020-12-23 06:56:18,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:56:18,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:56:18,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:56:18,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:56:18,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:18" (1/1) ... [2020-12-23 06:56:18,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:18" (1/1) ... [2020-12-23 06:56:18,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:18" (1/1) ... [2020-12-23 06:56:18,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:18" (1/1) ... [2020-12-23 06:56:18,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:18" (1/1) ... [2020-12-23 06:56:18,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:18" (1/1) ... [2020-12-23 06:56:18,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:18" (1/1) ... [2020-12-23 06:56:18,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:56:18,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:56:18,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:56:18,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:56:18,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:18" (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 [2020-12-23 06:56:18,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:56:18,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:56:18,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:56:18,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:56:18,924 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:56:18,924 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 06:56:18,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:56:18 BoogieIcfgContainer [2020-12-23 06:56:18,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:56:18,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:56:18,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:56:18,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:56:18,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:56:18" (1/3) ... [2020-12-23 06:56:18,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca3fbb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:56:18, skipping insertion in model container [2020-12-23 06:56:18,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:18" (2/3) ... [2020-12-23 06:56:18,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca3fbb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:56:18, skipping insertion in model container [2020-12-23 06:56:18,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:56:18" (3/3) ... [2020-12-23 06:56:18,935 INFO L111 eAbstractionObserver]: Analyzing ICFG up.i [2020-12-23 06:56:18,941 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:56:18,946 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:56:18,987 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:56:19,037 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:56:19,037 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:56:19,037 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:56:19,037 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:56:19,038 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:56:19,038 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:56:19,038 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:56:19,038 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:56:19,054 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-23 06:56:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:56:19,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:19,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:19,061 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:19,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:19,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1808851121, now seen corresponding path program 1 times [2020-12-23 06:56:19,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:19,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523330730] [2020-12-23 06:56:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:19,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523330730] [2020-12-23 06:56:19,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:56:19,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 06:56:19,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753444476] [2020-12-23 06:56:19,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:56:19,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:19,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:56:19,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:56:19,358 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 5 states. [2020-12-23 06:56:19,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:19,449 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2020-12-23 06:56:19,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:56:19,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 06:56:19,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:19,460 INFO L225 Difference]: With dead ends: 27 [2020-12-23 06:56:19,460 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 06:56:19,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:56:19,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 06:56:19,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 06:56:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 06:56:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-23 06:56:19,499 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2020-12-23 06:56:19,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:19,499 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-23 06:56:19,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:56:19,500 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-23 06:56:19,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 06:56:19,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:19,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:19,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:56:19,501 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:19,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:19,502 INFO L82 PathProgramCache]: Analyzing trace with hash 291256044, now seen corresponding path program 1 times [2020-12-23 06:56:19,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:19,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715914182] [2020-12-23 06:56:19,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:19,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715914182] [2020-12-23 06:56:19,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41427588] [2020-12-23 06:56:19,625 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 [2020-12-23 06:56:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:19,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:56:19,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:19,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:19,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:56:19,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2020-12-23 06:56:19,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977522026] [2020-12-23 06:56:19,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:56:19,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:19,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:56:19,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:56:19,783 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2020-12-23 06:56:19,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:19,863 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-12-23 06:56:19,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:56:19,864 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 06:56:19,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:19,865 INFO L225 Difference]: With dead ends: 20 [2020-12-23 06:56:19,865 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 06:56:19,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:56:19,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 06:56:19,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2020-12-23 06:56:19,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 06:56:19,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-23 06:56:19,870 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-12-23 06:56:19,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:19,870 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-23 06:56:19,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:56:19,871 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-23 06:56:19,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:56:19,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:19,871 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:20,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 06:56:20,086 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:20,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:20,088 INFO L82 PathProgramCache]: Analyzing trace with hash 979689165, now seen corresponding path program 1 times [2020-12-23 06:56:20,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:20,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984813954] [2020-12-23 06:56:20,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:20,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984813954] [2020-12-23 06:56:20,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947881153] [2020-12-23 06:56:20,160 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 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 [2020-12-23 06:56:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:20,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:56:20,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:20,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:20,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:20,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-23 06:56:20,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517549227] [2020-12-23 06:56:20,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:56:20,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:20,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:56:20,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:56:20,287 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 10 states. [2020-12-23 06:56:20,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:20,352 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-12-23 06:56:20,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:56:20,353 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2020-12-23 06:56:20,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:20,353 INFO L225 Difference]: With dead ends: 23 [2020-12-23 06:56:20,354 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 06:56:20,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:56:20,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 06:56:20,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 06:56:20,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 06:56:20,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-12-23 06:56:20,358 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2020-12-23 06:56:20,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:20,359 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-12-23 06:56:20,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:56:20,359 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-12-23 06:56:20,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:56:20,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:20,360 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:20,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:20,574 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:20,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:20,576 INFO L82 PathProgramCache]: Analyzing trace with hash -510353528, now seen corresponding path program 2 times [2020-12-23 06:56:20,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:20,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046192438] [2020-12-23 06:56:20,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:20,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046192438] [2020-12-23 06:56:20,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036401160] [2020-12-23 06:56:20,641 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 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 [2020-12-23 06:56:20,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:56:20,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:20,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 06:56:20,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:20,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:20,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-23 06:56:20,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490502012] [2020-12-23 06:56:20,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:56:20,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:20,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:56:20,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:56:20,764 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2020-12-23 06:56:20,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:20,837 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-12-23 06:56:20,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:56:20,837 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-23 06:56:20,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:20,838 INFO L225 Difference]: With dead ends: 24 [2020-12-23 06:56:20,839 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 06:56:20,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:56:20,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 06:56:20,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2020-12-23 06:56:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 06:56:20,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-23 06:56:20,844 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-12-23 06:56:20,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:20,845 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-23 06:56:20,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:56:20,845 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-23 06:56:20,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 06:56:20,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:20,846 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:21,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:21,061 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:21,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:21,062 INFO L82 PathProgramCache]: Analyzing trace with hash 247095473, now seen corresponding path program 3 times [2020-12-23 06:56:21,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:21,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41752228] [2020-12-23 06:56:21,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:21,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41752228] [2020-12-23 06:56:21,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912971773] [2020-12-23 06:56:21,143 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 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 [2020-12-23 06:56:21,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 06:56:21,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:21,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:56:21,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:21,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:21,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-23 06:56:21,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883106512] [2020-12-23 06:56:21,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:56:21,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:21,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:56:21,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:56:21,268 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 13 states. [2020-12-23 06:56:21,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:21,346 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-23 06:56:21,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:56:21,346 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-12-23 06:56:21,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:21,347 INFO L225 Difference]: With dead ends: 30 [2020-12-23 06:56:21,347 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 06:56:21,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:56:21,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 06:56:21,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 06:56:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 06:56:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-23 06:56:21,352 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2020-12-23 06:56:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:21,353 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-23 06:56:21,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:56:21,353 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-23 06:56:21,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:56:21,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:21,354 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:21,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:21,568 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:21,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:21,570 INFO L82 PathProgramCache]: Analyzing trace with hash 576015340, now seen corresponding path program 4 times [2020-12-23 06:56:21,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:21,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35400590] [2020-12-23 06:56:21,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:21,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35400590] [2020-12-23 06:56:21,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513062273] [2020-12-23 06:56:21,671 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 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 [2020-12-23 06:56:21,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:56:21,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:21,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:56:21,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:21,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:21,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-23 06:56:21,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59611926] [2020-12-23 06:56:21,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:56:21,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:21,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:56:21,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:56:21,783 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2020-12-23 06:56:21,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:21,879 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-23 06:56:21,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:56:21,880 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-23 06:56:21,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:21,881 INFO L225 Difference]: With dead ends: 28 [2020-12-23 06:56:21,881 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 06:56:21,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:56:21,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 06:56:21,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2020-12-23 06:56:21,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 06:56:21,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-23 06:56:21,887 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-12-23 06:56:21,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:21,888 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-23 06:56:21,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:56:21,888 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-23 06:56:21,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 06:56:21,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:21,889 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:22,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 06:56:22,098 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:22,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:22,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1683466701, now seen corresponding path program 5 times [2020-12-23 06:56:22,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:22,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155637829] [2020-12-23 06:56:22,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:22,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155637829] [2020-12-23 06:56:22,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379285316] [2020-12-23 06:56:22,210 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 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 [2020-12-23 06:56:22,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 06:56:22,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:22,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:56:22,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:22,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:22,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-23 06:56:22,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894855887] [2020-12-23 06:56:22,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:56:22,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:22,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:56:22,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:56:22,367 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 16 states. [2020-12-23 06:56:22,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:22,472 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-12-23 06:56:22,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:56:22,472 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-12-23 06:56:22,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:22,473 INFO L225 Difference]: With dead ends: 37 [2020-12-23 06:56:22,473 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 06:56:22,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:56:22,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 06:56:22,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 06:56:22,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 06:56:22,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-23 06:56:22,479 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-12-23 06:56:22,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:22,479 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-23 06:56:22,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:56:22,479 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-23 06:56:22,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 06:56:22,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:22,480 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:22,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:22,695 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:22,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:22,696 INFO L82 PathProgramCache]: Analyzing trace with hash 230981512, now seen corresponding path program 6 times [2020-12-23 06:56:22,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:22,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475377679] [2020-12-23 06:56:22,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:22,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475377679] [2020-12-23 06:56:22,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535298904] [2020-12-23 06:56:22,762 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 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 [2020-12-23 06:56:22,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 06:56:22,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:22,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:56:22,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:22,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:22,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-23 06:56:22,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744573441] [2020-12-23 06:56:22,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:56:22,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:22,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:56:22,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:56:22,888 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2020-12-23 06:56:22,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:22,991 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-12-23 06:56:22,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:56:22,991 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-12-23 06:56:22,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:22,993 INFO L225 Difference]: With dead ends: 32 [2020-12-23 06:56:22,993 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 06:56:22,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:56:22,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 06:56:23,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2020-12-23 06:56:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 06:56:23,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-23 06:56:23,005 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2020-12-23 06:56:23,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:23,006 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-23 06:56:23,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:56:23,006 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-23 06:56:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 06:56:23,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:23,007 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:23,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:23,221 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:23,222 INFO L82 PathProgramCache]: Analyzing trace with hash 637436081, now seen corresponding path program 7 times [2020-12-23 06:56:23,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:23,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711743212] [2020-12-23 06:56:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:23,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711743212] [2020-12-23 06:56:23,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90473861] [2020-12-23 06:56:23,325 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 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 [2020-12-23 06:56:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:23,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 06:56:23,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:23,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:23,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2020-12-23 06:56:23,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075584489] [2020-12-23 06:56:23,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:56:23,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:23,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:56:23,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:56:23,517 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 19 states. [2020-12-23 06:56:23,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:23,651 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-12-23 06:56:23,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:56:23,652 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-12-23 06:56:23,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:23,652 INFO L225 Difference]: With dead ends: 44 [2020-12-23 06:56:23,653 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 06:56:23,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:56:23,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 06:56:23,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-23 06:56:23,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 06:56:23,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-12-23 06:56:23,658 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2020-12-23 06:56:23,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:23,658 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-12-23 06:56:23,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:56:23,659 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-12-23 06:56:23,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:56:23,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:23,659 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:23,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 06:56:23,873 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:23,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:23,874 INFO L82 PathProgramCache]: Analyzing trace with hash -45874964, now seen corresponding path program 8 times [2020-12-23 06:56:23,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:23,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959170382] [2020-12-23 06:56:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:23,953 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:23,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959170382] [2020-12-23 06:56:23,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007594085] [2020-12-23 06:56:23,954 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 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 [2020-12-23 06:56:24,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:56:24,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:24,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 06:56:24,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:24,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:24,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-12-23 06:56:24,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766974581] [2020-12-23 06:56:24,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:56:24,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:24,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:56:24,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:56:24,085 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2020-12-23 06:56:24,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:24,189 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-12-23 06:56:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:56:24,189 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-12-23 06:56:24,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:24,190 INFO L225 Difference]: With dead ends: 36 [2020-12-23 06:56:24,190 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 06:56:24,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:56:24,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 06:56:24,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-12-23 06:56:24,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 06:56:24,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-23 06:56:24,196 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2020-12-23 06:56:24,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:24,196 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-23 06:56:24,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:56:24,196 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-23 06:56:24,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 06:56:24,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:24,197 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:24,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:24,413 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:24,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:24,414 INFO L82 PathProgramCache]: Analyzing trace with hash -856632115, now seen corresponding path program 9 times [2020-12-23 06:56:24,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:24,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262902643] [2020-12-23 06:56:24,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:24,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262902643] [2020-12-23 06:56:24,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126059930] [2020-12-23 06:56:24,539 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 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 [2020-12-23 06:56:24,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 06:56:24,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:24,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:56:24,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:24,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:24,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2020-12-23 06:56:24,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327335663] [2020-12-23 06:56:24,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:56:24,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:24,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:56:24,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:56:24,762 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 22 states. [2020-12-23 06:56:24,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:24,927 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-12-23 06:56:24,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:56:24,927 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2020-12-23 06:56:24,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:24,928 INFO L225 Difference]: With dead ends: 51 [2020-12-23 06:56:24,928 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 06:56:24,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:56:24,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 06:56:24,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-23 06:56:24,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 06:56:24,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-12-23 06:56:24,934 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2020-12-23 06:56:24,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:24,935 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-12-23 06:56:24,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:56:24,935 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-12-23 06:56:24,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 06:56:24,936 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:24,936 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:25,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:25,147 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:25,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:25,148 INFO L82 PathProgramCache]: Analyzing trace with hash -2001354872, now seen corresponding path program 10 times [2020-12-23 06:56:25,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:25,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948602137] [2020-12-23 06:56:25,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:25,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948602137] [2020-12-23 06:56:25,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088016069] [2020-12-23 06:56:25,287 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:25,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:56:25,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:25,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 06:56:25,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:25,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:25,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-12-23 06:56:25,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058217576] [2020-12-23 06:56:25,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:56:25,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:25,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:56:25,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:56:25,400 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2020-12-23 06:56:25,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:25,517 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-12-23 06:56:25,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 06:56:25,517 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-12-23 06:56:25,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:25,518 INFO L225 Difference]: With dead ends: 40 [2020-12-23 06:56:25,518 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 06:56:25,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:56:25,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 06:56:25,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-12-23 06:56:25,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 06:56:25,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-23 06:56:25,525 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2020-12-23 06:56:25,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:25,525 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-23 06:56:25,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:56:25,526 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-23 06:56:25,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 06:56:25,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:25,526 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:25,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 06:56:25,741 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:25,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:25,741 INFO L82 PathProgramCache]: Analyzing trace with hash 377831601, now seen corresponding path program 11 times [2020-12-23 06:56:25,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:25,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260856825] [2020-12-23 06:56:25,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:25,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260856825] [2020-12-23 06:56:25,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134671777] [2020-12-23 06:56:25,910 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:25,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 06:56:25,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:25,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 06:56:25,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:26,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:26,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2020-12-23 06:56:26,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227769261] [2020-12-23 06:56:26,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:56:26,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:26,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:56:26,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:56:26,207 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 25 states. [2020-12-23 06:56:26,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:26,379 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-12-23 06:56:26,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:56:26,379 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 31 [2020-12-23 06:56:26,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:26,379 INFO L225 Difference]: With dead ends: 58 [2020-12-23 06:56:26,380 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 06:56:26,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:56:26,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 06:56:26,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 06:56:26,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 06:56:26,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-23 06:56:26,387 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2020-12-23 06:56:26,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:26,387 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-23 06:56:26,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:56:26,387 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-23 06:56:26,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 06:56:26,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:26,388 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:26,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:56:26,602 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:26,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:26,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1007703532, now seen corresponding path program 12 times [2020-12-23 06:56:26,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:26,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687763827] [2020-12-23 06:56:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:26,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687763827] [2020-12-23 06:56:26,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654637611] [2020-12-23 06:56:26,703 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:26,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 06:56:26,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:26,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:56:26,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:26,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:26,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-12-23 06:56:26,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740414527] [2020-12-23 06:56:26,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:56:26,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:26,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:56:26,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:56:26,815 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-12-23 06:56:26,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:26,981 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-12-23 06:56:26,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:56:26,982 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-12-23 06:56:26,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:26,986 INFO L225 Difference]: With dead ends: 44 [2020-12-23 06:56:26,986 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 06:56:26,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:56:26,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 06:56:27,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-12-23 06:56:27,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 06:56:27,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-23 06:56:27,002 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2020-12-23 06:56:27,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:27,002 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-23 06:56:27,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:56:27,002 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-23 06:56:27,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 06:56:27,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:27,003 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:27,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:56:27,219 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:27,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:27,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1320656947, now seen corresponding path program 13 times [2020-12-23 06:56:27,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:27,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476142457] [2020-12-23 06:56:27,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:27,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476142457] [2020-12-23 06:56:27,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482907376] [2020-12-23 06:56:27,405 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:27,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 06:56:27,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:27,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:27,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2020-12-23 06:56:27,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896074378] [2020-12-23 06:56:27,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:56:27,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:27,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:56:27,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:56:27,716 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 28 states. [2020-12-23 06:56:27,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:27,926 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-12-23 06:56:27,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 06:56:27,926 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2020-12-23 06:56:27,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:27,927 INFO L225 Difference]: With dead ends: 65 [2020-12-23 06:56:27,927 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 06:56:27,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:56:27,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 06:56:27,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 06:56:27,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 06:56:27,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-12-23 06:56:27,934 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 35 [2020-12-23 06:56:27,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:27,935 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-12-23 06:56:27,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:56:27,935 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-12-23 06:56:27,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 06:56:27,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:27,936 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:28,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:28,151 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:28,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:28,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1149263752, now seen corresponding path program 14 times [2020-12-23 06:56:28,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:28,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659021674] [2020-12-23 06:56:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:28,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659021674] [2020-12-23 06:56:28,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990226263] [2020-12-23 06:56:28,304 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:28,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:56:28,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:28,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 06:56:28,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:28,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:28,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-12-23 06:56:28,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360053071] [2020-12-23 06:56:28,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:56:28,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:28,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:56:28,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:56:28,444 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2020-12-23 06:56:28,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:28,596 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-12-23 06:56:28,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:56:28,596 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-12-23 06:56:28,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:28,597 INFO L225 Difference]: With dead ends: 48 [2020-12-23 06:56:28,597 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:56:28,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:56:28,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:56:28,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-12-23 06:56:28,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 06:56:28,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-12-23 06:56:28,604 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2020-12-23 06:56:28,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:28,605 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-12-23 06:56:28,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:56:28,605 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-12-23 06:56:28,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 06:56:28,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:28,606 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:28,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 06:56:28,820 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:28,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:28,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1758027599, now seen corresponding path program 15 times [2020-12-23 06:56:28,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:28,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855620789] [2020-12-23 06:56:28,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:29,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855620789] [2020-12-23 06:56:29,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256932651] [2020-12-23 06:56:29,031 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:29,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 06:56:29,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:29,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 06:56:29,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:29,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:29,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2020-12-23 06:56:29,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462469016] [2020-12-23 06:56:29,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:56:29,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:29,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:56:29,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:56:29,335 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 31 states. [2020-12-23 06:56:29,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:29,611 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-12-23 06:56:29,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:56:29,611 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2020-12-23 06:56:29,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:29,612 INFO L225 Difference]: With dead ends: 72 [2020-12-23 06:56:29,612 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 06:56:29,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=374, Invalid=1266, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:56:29,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 06:56:29,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-23 06:56:29,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 06:56:29,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-12-23 06:56:29,622 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 39 [2020-12-23 06:56:29,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:29,622 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-12-23 06:56:29,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:56:29,622 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-12-23 06:56:29,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 06:56:29,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:29,623 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:29,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:56:29,837 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:29,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:29,838 INFO L82 PathProgramCache]: Analyzing trace with hash -895333652, now seen corresponding path program 16 times [2020-12-23 06:56:29,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:29,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656223936] [2020-12-23 06:56:29,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:30,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656223936] [2020-12-23 06:56:30,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62642979] [2020-12-23 06:56:30,001 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:30,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:56:30,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:30,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 06:56:30,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:30,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:30,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-12-23 06:56:30,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887780315] [2020-12-23 06:56:30,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:56:30,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:30,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:56:30,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:56:30,126 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2020-12-23 06:56:30,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:30,315 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-12-23 06:56:30,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:56:30,319 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-12-23 06:56:30,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:30,319 INFO L225 Difference]: With dead ends: 52 [2020-12-23 06:56:30,320 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 06:56:30,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=228, Invalid=422, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:56:30,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 06:56:30,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2020-12-23 06:56:30,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 06:56:30,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-12-23 06:56:30,328 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2020-12-23 06:56:30,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:30,328 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-12-23 06:56:30,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:56:30,328 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-12-23 06:56:30,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 06:56:30,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:30,329 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:30,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:56:30,543 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:30,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:30,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1133098291, now seen corresponding path program 17 times [2020-12-23 06:56:30,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:30,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845688935] [2020-12-23 06:56:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:30,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845688935] [2020-12-23 06:56:30,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130491945] [2020-12-23 06:56:30,843 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:30,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 06:56:30,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:30,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:56:30,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:31,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:31,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2020-12-23 06:56:31,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063852349] [2020-12-23 06:56:31,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:56:31,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:31,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:56:31,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:56:31,268 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 34 states. [2020-12-23 06:56:31,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:31,623 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-12-23 06:56:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:56:31,623 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 43 [2020-12-23 06:56:31,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:31,624 INFO L225 Difference]: With dead ends: 79 [2020-12-23 06:56:31,624 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 06:56:31,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1531, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:56:31,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 06:56:31,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 06:56:31,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 06:56:31,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-12-23 06:56:31,632 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2020-12-23 06:56:31,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:31,633 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-12-23 06:56:31,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:56:31,633 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-12-23 06:56:31,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 06:56:31,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:31,634 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:31,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:31,848 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:31,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:31,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1589878904, now seen corresponding path program 18 times [2020-12-23 06:56:31,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:31,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834275946] [2020-12-23 06:56:31,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:32,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834275946] [2020-12-23 06:56:32,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503759662] [2020-12-23 06:56:32,018 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:32,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-23 06:56:32,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:32,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 06:56:32,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:32,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:32,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-12-23 06:56:32,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566133472] [2020-12-23 06:56:32,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:56:32,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:32,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:56:32,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:56:32,189 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2020-12-23 06:56:32,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:32,406 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-12-23 06:56:32,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 06:56:32,406 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-12-23 06:56:32,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:32,407 INFO L225 Difference]: With dead ends: 56 [2020-12-23 06:56:32,407 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 06:56:32,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:56:32,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 06:56:32,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-12-23 06:56:32,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 06:56:32,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-23 06:56:32,415 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2020-12-23 06:56:32,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:32,415 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-23 06:56:32,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:56:32,415 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-23 06:56:32,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 06:56:32,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:32,416 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:32,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:32,617 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:32,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:32,618 INFO L82 PathProgramCache]: Analyzing trace with hash 821731505, now seen corresponding path program 19 times [2020-12-23 06:56:32,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:32,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884316272] [2020-12-23 06:56:32,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:32,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884316272] [2020-12-23 06:56:32,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540806854] [2020-12-23 06:56:32,858 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:32,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:56:32,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:33,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:33,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2020-12-23 06:56:33,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729197225] [2020-12-23 06:56:33,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 06:56:33,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:33,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 06:56:33,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1027, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:56:33,311 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 37 states. [2020-12-23 06:56:33,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:33,698 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-12-23 06:56:33,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:56:33,699 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 47 [2020-12-23 06:56:33,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:33,699 INFO L225 Difference]: With dead ends: 86 [2020-12-23 06:56:33,699 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 06:56:33,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=531, Invalid=1821, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:56:33,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 06:56:33,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-23 06:56:33,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 06:56:33,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-12-23 06:56:33,708 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2020-12-23 06:56:33,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:33,708 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-12-23 06:56:33,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 06:56:33,708 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-12-23 06:56:33,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 06:56:33,709 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:33,709 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:33,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 06:56:33,923 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:33,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:33,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1726078956, now seen corresponding path program 20 times [2020-12-23 06:56:33,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:33,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091849723] [2020-12-23 06:56:33,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:34,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091849723] [2020-12-23 06:56:34,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656385389] [2020-12-23 06:56:34,075 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:34,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:56:34,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:34,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 06:56:34,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:34,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:34,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-12-23 06:56:34,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533136055] [2020-12-23 06:56:34,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:56:34,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:34,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:56:34,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:56:34,256 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2020-12-23 06:56:34,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:34,471 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2020-12-23 06:56:34,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 06:56:34,472 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-12-23 06:56:34,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:34,472 INFO L225 Difference]: With dead ends: 60 [2020-12-23 06:56:34,473 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 06:56:34,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:56:34,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 06:56:34,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-12-23 06:56:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 06:56:34,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-23 06:56:34,490 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2020-12-23 06:56:34,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:34,492 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-23 06:56:34,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:56:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-23 06:56:34,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 06:56:34,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:34,501 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:34,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 06:56:34,716 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:34,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:34,716 INFO L82 PathProgramCache]: Analyzing trace with hash -2020436531, now seen corresponding path program 21 times [2020-12-23 06:56:34,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:34,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491820777] [2020-12-23 06:56:34,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:35,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491820777] [2020-12-23 06:56:35,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839717454] [2020-12-23 06:56:35,049 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:35,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-23 06:56:35,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:35,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 06:56:35,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:35,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:35,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2020-12-23 06:56:35,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111823464] [2020-12-23 06:56:35,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 06:56:35,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:35,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 06:56:35,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=1204, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:56:35,606 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 40 states. [2020-12-23 06:56:36,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:36,011 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-12-23 06:56:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 06:56:36,011 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 51 [2020-12-23 06:56:36,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:36,012 INFO L225 Difference]: With dead ends: 93 [2020-12-23 06:56:36,012 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 06:56:36,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=620, Invalid=2136, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 06:56:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 06:56:36,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-23 06:56:36,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 06:56:36,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-12-23 06:56:36,020 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 51 [2020-12-23 06:56:36,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:36,020 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-12-23 06:56:36,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 06:56:36,020 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-12-23 06:56:36,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 06:56:36,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:36,021 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:36,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:36,237 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:36,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:36,237 INFO L82 PathProgramCache]: Analyzing trace with hash -318652536, now seen corresponding path program 22 times [2020-12-23 06:56:36,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:36,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108235463] [2020-12-23 06:56:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 66 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:36,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108235463] [2020-12-23 06:56:36,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013618990] [2020-12-23 06:56:36,382 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:36,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:56:36,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:36,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 06:56:36,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:36,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:36,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-23 06:56:36,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465213887] [2020-12-23 06:56:36,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:56:36,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:36,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:56:36,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:56:36,531 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2020-12-23 06:56:36,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:36,779 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-12-23 06:56:36,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 06:56:36,780 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-12-23 06:56:36,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:36,781 INFO L225 Difference]: With dead ends: 64 [2020-12-23 06:56:36,781 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 06:56:36,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=641, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:56:36,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 06:56:36,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-12-23 06:56:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 06:56:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-12-23 06:56:36,789 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2020-12-23 06:56:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:36,789 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-12-23 06:56:36,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:56:36,789 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-12-23 06:56:36,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 06:56:36,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:36,790 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:37,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 06:56:37,005 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:37,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:37,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1095155535, now seen corresponding path program 23 times [2020-12-23 06:56:37,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:37,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944716079] [2020-12-23 06:56:37,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:37,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944716079] [2020-12-23 06:56:37,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044535695] [2020-12-23 06:56:37,363 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:37,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-23 06:56:37,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:37,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 06:56:37,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:37,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:37,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2020-12-23 06:56:37,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316178015] [2020-12-23 06:56:37,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 06:56:37,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:37,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 06:56:37,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:56:37,972 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 43 states. [2020-12-23 06:56:38,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:38,435 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2020-12-23 06:56:38,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 06:56:38,435 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 55 [2020-12-23 06:56:38,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:38,436 INFO L225 Difference]: With dead ends: 100 [2020-12-23 06:56:38,436 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 06:56:38,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=716, Invalid=2476, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:56:38,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 06:56:38,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-23 06:56:38,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 06:56:38,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-12-23 06:56:38,445 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 55 [2020-12-23 06:56:38,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:38,445 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-12-23 06:56:38,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 06:56:38,445 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-12-23 06:56:38,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 06:56:38,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:38,446 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:38,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:38,647 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:38,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:38,649 INFO L82 PathProgramCache]: Analyzing trace with hash 548869356, now seen corresponding path program 24 times [2020-12-23 06:56:38,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:38,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741434069] [2020-12-23 06:56:38,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:38,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741434069] [2020-12-23 06:56:38,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262750387] [2020-12-23 06:56:38,829 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:38,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 06:56:38,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:38,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:56:38,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:39,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:39,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-12-23 06:56:39,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167104932] [2020-12-23 06:56:39,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:56:39,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:39,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:56:39,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:56:39,008 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-12-23 06:56:39,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:39,264 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2020-12-23 06:56:39,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 06:56:39,265 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2020-12-23 06:56:39,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:39,266 INFO L225 Difference]: With dead ends: 68 [2020-12-23 06:56:39,266 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 06:56:39,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=398, Invalid=724, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:56:39,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 06:56:39,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-12-23 06:56:39,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 06:56:39,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-12-23 06:56:39,274 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2020-12-23 06:56:39,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:39,274 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-12-23 06:56:39,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:56:39,274 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-12-23 06:56:39,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 06:56:39,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:39,275 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:39,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 06:56:39,488 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:39,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:39,489 INFO L82 PathProgramCache]: Analyzing trace with hash 431309005, now seen corresponding path program 25 times [2020-12-23 06:56:39,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:39,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495772182] [2020-12-23 06:56:39,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:39,919 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:39,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495772182] [2020-12-23 06:56:39,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870003714] [2020-12-23 06:56:39,920 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:39,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 06:56:39,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:40,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:40,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2020-12-23 06:56:40,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578903787] [2020-12-23 06:56:40,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 06:56:40,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:40,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 06:56:40,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1600, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:56:40,513 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 46 states. [2020-12-23 06:56:41,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:41,077 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2020-12-23 06:56:41,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 06:56:41,077 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 59 [2020-12-23 06:56:41,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:41,078 INFO L225 Difference]: With dead ends: 107 [2020-12-23 06:56:41,078 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 06:56:41,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=819, Invalid=2841, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:56:41,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 06:56:41,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-12-23 06:56:41,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 06:56:41,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-12-23 06:56:41,087 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 59 [2020-12-23 06:56:41,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:41,087 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-12-23 06:56:41,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 06:56:41,087 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-12-23 06:56:41,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 06:56:41,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:41,088 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:41,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 06:56:41,303 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:41,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:41,303 INFO L82 PathProgramCache]: Analyzing trace with hash -471302264, now seen corresponding path program 26 times [2020-12-23 06:56:41,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:41,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803626504] [2020-12-23 06:56:41,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:41,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803626504] [2020-12-23 06:56:41,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133131208] [2020-12-23 06:56:41,501 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:41,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:56:41,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:41,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 06:56:41,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:41,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:41,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-23 06:56:41,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178234744] [2020-12-23 06:56:41,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:56:41,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:41,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:56:41,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:56:41,664 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2020-12-23 06:56:41,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:41,945 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2020-12-23 06:56:41,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 06:56:41,946 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2020-12-23 06:56:41,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:41,946 INFO L225 Difference]: With dead ends: 72 [2020-12-23 06:56:41,946 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 06:56:41,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:56:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 06:56:41,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-12-23 06:56:41,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 06:56:41,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-12-23 06:56:41,954 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 60 [2020-12-23 06:56:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:41,955 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-12-23 06:56:41,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:56:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-12-23 06:56:41,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 06:56:41,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:41,956 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:42,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 06:56:42,170 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:42,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:42,170 INFO L82 PathProgramCache]: Analyzing trace with hash -312835919, now seen corresponding path program 27 times [2020-12-23 06:56:42,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:42,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153801721] [2020-12-23 06:56:42,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:42,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153801721] [2020-12-23 06:56:42,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146798647] [2020-12-23 06:56:42,678 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:42,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-23 06:56:42,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:42,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 06:56:42,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:43,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:43,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2020-12-23 06:56:43,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973725907] [2020-12-23 06:56:43,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 06:56:43,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:43,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 06:56:43,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=1819, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:56:43,426 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 49 states. [2020-12-23 06:56:44,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:44,051 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-12-23 06:56:44,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 06:56:44,052 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 63 [2020-12-23 06:56:44,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:44,052 INFO L225 Difference]: With dead ends: 114 [2020-12-23 06:56:44,052 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 06:56:44,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=929, Invalid=3231, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 06:56:44,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 06:56:44,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-12-23 06:56:44,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 06:56:44,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-12-23 06:56:44,061 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 63 [2020-12-23 06:56:44,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:44,062 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-12-23 06:56:44,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 06:56:44,062 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-12-23 06:56:44,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 06:56:44,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:44,062 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:44,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 06:56:44,276 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:44,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:44,277 INFO L82 PathProgramCache]: Analyzing trace with hash -636884500, now seen corresponding path program 28 times [2020-12-23 06:56:44,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:44,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866728877] [2020-12-23 06:56:44,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 105 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:44,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866728877] [2020-12-23 06:56:44,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463673525] [2020-12-23 06:56:44,484 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:44,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:56:44,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:44,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 06:56:44,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:44,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:44,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-12-23 06:56:44,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429121389] [2020-12-23 06:56:44,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:56:44,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:44,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:56:44,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:56:44,651 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2020-12-23 06:56:44,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:44,943 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-12-23 06:56:44,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 06:56:44,944 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2020-12-23 06:56:44,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:44,944 INFO L225 Difference]: With dead ends: 76 [2020-12-23 06:56:44,944 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 06:56:44,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=501, Invalid=905, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:56:44,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 06:56:44,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2020-12-23 06:56:44,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 06:56:44,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-12-23 06:56:44,955 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2020-12-23 06:56:44,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:44,956 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-12-23 06:56:44,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:56:44,956 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-12-23 06:56:44,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 06:56:44,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:44,956 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:45,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:45,172 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:45,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:45,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1744194509, now seen corresponding path program 29 times [2020-12-23 06:56:45,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:45,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105183951] [2020-12-23 06:56:45,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:45,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105183951] [2020-12-23 06:56:45,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486342612] [2020-12-23 06:56:45,759 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:45,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-23 06:56:45,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:45,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:56:45,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:46,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:46,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2020-12-23 06:56:46,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114995104] [2020-12-23 06:56:46,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 06:56:46,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:46,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 06:56:46,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:56:46,518 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 52 states. [2020-12-23 06:56:47,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:47,199 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2020-12-23 06:56:47,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 06:56:47,199 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 67 [2020-12-23 06:56:47,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:47,200 INFO L225 Difference]: With dead ends: 121 [2020-12-23 06:56:47,200 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 06:56:47,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1046, Invalid=3646, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 06:56:47,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 06:56:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-12-23 06:56:47,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 06:56:47,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-12-23 06:56:47,208 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 67 [2020-12-23 06:56:47,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:47,208 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-12-23 06:56:47,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 06:56:47,208 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-12-23 06:56:47,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 06:56:47,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:47,208 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:47,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:47,412 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:47,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:47,412 INFO L82 PathProgramCache]: Analyzing trace with hash 805871496, now seen corresponding path program 30 times [2020-12-23 06:56:47,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:47,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101327174] [2020-12-23 06:56:47,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 120 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:47,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101327174] [2020-12-23 06:56:47,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882113322] [2020-12-23 06:56:47,616 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:47,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-23 06:56:47,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:47,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 06:56:47,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:47,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:47,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-12-23 06:56:47,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845276403] [2020-12-23 06:56:47,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:56:47,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:47,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:56:47,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:56:47,804 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2020-12-23 06:56:48,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:48,173 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2020-12-23 06:56:48,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 06:56:48,174 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2020-12-23 06:56:48,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:48,175 INFO L225 Difference]: With dead ends: 80 [2020-12-23 06:56:48,175 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 06:56:48,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=557, Invalid=1003, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:56:48,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 06:56:48,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-12-23 06:56:48,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 06:56:48,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-12-23 06:56:48,185 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2020-12-23 06:56:48,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:48,185 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-12-23 06:56:48,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:56:48,186 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-12-23 06:56:48,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 06:56:48,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:48,186 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:48,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:48,395 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:48,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:48,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1144627023, now seen corresponding path program 31 times [2020-12-23 06:56:48,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:48,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529219959] [2020-12-23 06:56:48,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:48,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529219959] [2020-12-23 06:56:48,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43329301] [2020-12-23 06:56:48,978 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:49,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 06:56:49,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:49,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:49,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 55 [2020-12-23 06:56:49,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578618900] [2020-12-23 06:56:49,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 06:56:49,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:49,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 06:56:49,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=2299, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 06:56:49,813 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 55 states. [2020-12-23 06:56:50,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:50,604 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2020-12-23 06:56:50,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 06:56:50,605 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 71 [2020-12-23 06:56:50,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:50,605 INFO L225 Difference]: With dead ends: 128 [2020-12-23 06:56:50,605 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 06:56:50,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1170, Invalid=4086, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 06:56:50,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 06:56:50,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-12-23 06:56:50,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 06:56:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-12-23 06:56:50,615 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 71 [2020-12-23 06:56:50,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:50,615 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-12-23 06:56:50,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 06:56:50,616 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-12-23 06:56:50,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 06:56:50,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:50,616 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:50,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 06:56:50,831 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:50,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:50,832 INFO L82 PathProgramCache]: Analyzing trace with hash -960340244, now seen corresponding path program 32 times [2020-12-23 06:56:50,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:50,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085286409] [2020-12-23 06:56:50,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:51,069 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 136 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:51,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085286409] [2020-12-23 06:56:51,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612272158] [2020-12-23 06:56:51,070 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:51,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:56:51,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:51,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 06:56:51,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:51,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:51,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-12-23 06:56:51,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334879639] [2020-12-23 06:56:51,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:56:51,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:51,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:56:51,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:56:51,260 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2020-12-23 06:56:51,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:51,587 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2020-12-23 06:56:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:56:51,588 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2020-12-23 06:56:51,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:51,589 INFO L225 Difference]: With dead ends: 84 [2020-12-23 06:56:51,589 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 06:56:51,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=616, Invalid=1106, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:56:51,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 06:56:51,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2020-12-23 06:56:51,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 06:56:51,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-12-23 06:56:51,600 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 72 [2020-12-23 06:56:51,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:51,600 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-12-23 06:56:51,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:56:51,600 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-12-23 06:56:51,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 06:56:51,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:51,601 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:51,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:51,808 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:51,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:51,808 INFO L82 PathProgramCache]: Analyzing trace with hash -714230067, now seen corresponding path program 33 times [2020-12-23 06:56:51,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:51,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108939825] [2020-12-23 06:56:51,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 393 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:52,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108939825] [2020-12-23 06:56:52,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276416032] [2020-12-23 06:56:52,460 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:52,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-23 06:56:52,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:52,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 06:56:52,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:53,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:53,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2020-12-23 06:56:53,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655570127] [2020-12-23 06:56:53,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 06:56:53,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:53,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 06:56:53,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=2560, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:56:53,431 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 58 states. [2020-12-23 06:56:54,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:54,274 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2020-12-23 06:56:54,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 06:56:54,274 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 75 [2020-12-23 06:56:54,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:54,275 INFO L225 Difference]: With dead ends: 135 [2020-12-23 06:56:54,275 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 06:56:54,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1301, Invalid=4551, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 06:56:54,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 06:56:54,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-12-23 06:56:54,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 06:56:54,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-12-23 06:56:54,283 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 75 [2020-12-23 06:56:54,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:54,283 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-12-23 06:56:54,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 06:56:54,283 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-12-23 06:56:54,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 06:56:54,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:54,284 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:54,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 06:56:54,485 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:54,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:54,485 INFO L82 PathProgramCache]: Analyzing trace with hash -377872504, now seen corresponding path program 34 times [2020-12-23 06:56:54,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:54,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408025471] [2020-12-23 06:56:54,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 153 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:54,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408025471] [2020-12-23 06:56:54,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976536283] [2020-12-23 06:56:54,739 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:54,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:56:54,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:54,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 06:56:54,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:54,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:54,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-12-23 06:56:54,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122563187] [2020-12-23 06:56:54,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:56:54,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:54,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:56:54,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:56:54,927 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2020-12-23 06:56:55,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:55,274 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-12-23 06:56:55,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 06:56:55,275 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2020-12-23 06:56:55,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:55,276 INFO L225 Difference]: With dead ends: 88 [2020-12-23 06:56:55,276 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 06:56:55,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=1214, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:56:55,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 06:56:55,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2020-12-23 06:56:55,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 06:56:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-12-23 06:56:55,286 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 76 [2020-12-23 06:56:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:55,286 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-12-23 06:56:55,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:56:55,286 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-12-23 06:56:55,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 06:56:55,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:55,286 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:55,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:55,494 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:55,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:55,494 INFO L82 PathProgramCache]: Analyzing trace with hash -85663567, now seen corresponding path program 35 times [2020-12-23 06:56:55,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:55,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235826329] [2020-12-23 06:56:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 443 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:56,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235826329] [2020-12-23 06:56:56,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98779206] [2020-12-23 06:56:56,255 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:56,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-23 06:56:56,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:56,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 06:56:56,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:57,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:57,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 61 [2020-12-23 06:56:57,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831196862] [2020-12-23 06:56:57,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 06:56:57,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:57,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 06:56:57,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=2835, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:56:57,314 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 61 states. [2020-12-23 06:56:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:58,287 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2020-12-23 06:56:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:56:58,287 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 79 [2020-12-23 06:56:58,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:58,287 INFO L225 Difference]: With dead ends: 142 [2020-12-23 06:56:58,287 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 06:56:58,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1439, Invalid=5041, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 06:56:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 06:56:58,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-12-23 06:56:58,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 06:56:58,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-12-23 06:56:58,296 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 79 [2020-12-23 06:56:58,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:58,296 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-12-23 06:56:58,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 06:56:58,296 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-12-23 06:56:58,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 06:56:58,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:58,297 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:58,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 06:56:58,499 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:58,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:58,500 INFO L82 PathProgramCache]: Analyzing trace with hash -322407444, now seen corresponding path program 36 times [2020-12-23 06:56:58,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:58,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724933516] [2020-12-23 06:56:58,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:58,797 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 171 proven. 514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:58,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724933516] [2020-12-23 06:56:58,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359393664] [2020-12-23 06:56:58,797 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:58,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 06:56:58,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:58,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 06:56:58,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:59,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:59,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-12-23 06:56:59,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893361584] [2020-12-23 06:56:59,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:56:59,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:59,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:56:59,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:56:59,012 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2020-12-23 06:56:59,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:59,440 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2020-12-23 06:56:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 06:56:59,446 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2020-12-23 06:56:59,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:59,447 INFO L225 Difference]: With dead ends: 92 [2020-12-23 06:56:59,447 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 06:56:59,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=743, Invalid=1327, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:56:59,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 06:56:59,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-12-23 06:56:59,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 06:56:59,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-12-23 06:56:59,460 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 80 [2020-12-23 06:56:59,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:59,460 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-12-23 06:56:59,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:56:59,460 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-12-23 06:56:59,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 06:56:59,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:59,461 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:59,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 06:56:59,675 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:59,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:59,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1288470067, now seen corresponding path program 37 times [2020-12-23 06:56:59,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:59,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881845766] [2020-12-23 06:56:59,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 496 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:00,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881845766] [2020-12-23 06:57:00,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085931126] [2020-12-23 06:57:00,476 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:00,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 06:57:00,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:01,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:01,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2020-12-23 06:57:01,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119428990] [2020-12-23 06:57:01,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 06:57:01,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:01,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 06:57:01,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=3124, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 06:57:01,605 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 64 states. [2020-12-23 06:57:02,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:02,634 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2020-12-23 06:57:02,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 06:57:02,634 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 83 [2020-12-23 06:57:02,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:02,635 INFO L225 Difference]: With dead ends: 149 [2020-12-23 06:57:02,635 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 06:57:02,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1584, Invalid=5556, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 06:57:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 06:57:02,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-12-23 06:57:02,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 06:57:02,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-12-23 06:57:02,646 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2020-12-23 06:57:02,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:02,647 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-12-23 06:57:02,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 06:57:02,647 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-12-23 06:57:02,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 06:57:02,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:02,647 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:02,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 06:57:02,848 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:02,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:02,849 INFO L82 PathProgramCache]: Analyzing trace with hash 374669192, now seen corresponding path program 38 times [2020-12-23 06:57:02,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:02,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408777793] [2020-12-23 06:57:02,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 190 proven. 571 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:03,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408777793] [2020-12-23 06:57:03,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799121856] [2020-12-23 06:57:03,170 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:03,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:57:03,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:03,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 06:57:03,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:03,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:03,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-12-23 06:57:03,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959733016] [2020-12-23 06:57:03,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 06:57:03,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:03,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 06:57:03,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:57:03,383 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2020-12-23 06:57:03,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:03,809 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2020-12-23 06:57:03,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 06:57:03,810 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2020-12-23 06:57:03,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:03,811 INFO L225 Difference]: With dead ends: 96 [2020-12-23 06:57:03,811 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 06:57:03,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=811, Invalid=1445, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:57:03,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 06:57:03,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-12-23 06:57:03,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 06:57:03,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-12-23 06:57:03,825 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 84 [2020-12-23 06:57:03,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:03,825 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-12-23 06:57:03,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 06:57:03,825 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-12-23 06:57:03,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 06:57:03,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:03,826 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:04,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 06:57:04,041 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:04,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:04,041 INFO L82 PathProgramCache]: Analyzing trace with hash -845283151, now seen corresponding path program 39 times [2020-12-23 06:57:04,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:04,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615354394] [2020-12-23 06:57:04,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 552 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:04,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615354394] [2020-12-23 06:57:04,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249386608] [2020-12-23 06:57:04,914 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:05,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-23 06:57:05,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:05,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 06:57:05,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:06,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:06,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 67 [2020-12-23 06:57:06,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371941926] [2020-12-23 06:57:06,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 06:57:06,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:06,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 06:57:06,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=3427, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 06:57:06,180 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 67 states. [2020-12-23 06:57:07,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:07,321 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2020-12-23 06:57:07,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 06:57:07,322 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 87 [2020-12-23 06:57:07,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:07,322 INFO L225 Difference]: With dead ends: 156 [2020-12-23 06:57:07,322 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 06:57:07,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1736, Invalid=6096, Unknown=0, NotChecked=0, Total=7832 [2020-12-23 06:57:07,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 06:57:07,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-12-23 06:57:07,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 06:57:07,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-12-23 06:57:07,335 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 87 [2020-12-23 06:57:07,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:07,336 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-12-23 06:57:07,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-23 06:57:07,336 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-12-23 06:57:07,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 06:57:07,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:07,336 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:07,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:07,551 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:07,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:07,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1543231252, now seen corresponding path program 40 times [2020-12-23 06:57:07,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:07,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833887830] [2020-12-23 06:57:07,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 210 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:07,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833887830] [2020-12-23 06:57:07,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950184187] [2020-12-23 06:57:07,898 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:07,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:57:07,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:07,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 06:57:07,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:08,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:08,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2020-12-23 06:57:08,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109337087] [2020-12-23 06:57:08,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 06:57:08,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:08,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 06:57:08,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:57:08,106 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2020-12-23 06:57:08,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:08,649 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2020-12-23 06:57:08,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 06:57:08,650 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2020-12-23 06:57:08,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:08,651 INFO L225 Difference]: With dead ends: 100 [2020-12-23 06:57:08,651 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 06:57:08,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=882, Invalid=1568, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:57:08,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 06:57:08,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2020-12-23 06:57:08,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 06:57:08,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-12-23 06:57:08,662 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 88 [2020-12-23 06:57:08,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:08,662 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-12-23 06:57:08,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 06:57:08,662 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-12-23 06:57:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 06:57:08,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:08,663 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:08,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 06:57:08,865 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:08,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:08,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1067471667, now seen corresponding path program 41 times [2020-12-23 06:57:08,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:08,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086601476] [2020-12-23 06:57:08,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 611 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:09,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086601476] [2020-12-23 06:57:09,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707638070] [2020-12-23 06:57:09,811 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:09,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2020-12-23 06:57:09,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:09,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 06:57:09,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:11,113 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:11,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:11,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2020-12-23 06:57:11,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708107413] [2020-12-23 06:57:11,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 06:57:11,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:11,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 06:57:11,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=3744, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:57:11,115 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 70 states. [2020-12-23 06:57:12,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:12,386 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2020-12-23 06:57:12,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 06:57:12,386 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 91 [2020-12-23 06:57:12,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:12,387 INFO L225 Difference]: With dead ends: 163 [2020-12-23 06:57:12,387 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 06:57:12,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1895, Invalid=6661, Unknown=0, NotChecked=0, Total=8556 [2020-12-23 06:57:12,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 06:57:12,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-12-23 06:57:12,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 06:57:12,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-12-23 06:57:12,403 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2020-12-23 06:57:12,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:12,403 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-12-23 06:57:12,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 06:57:12,403 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-12-23 06:57:12,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-23 06:57:12,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:12,404 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:12,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:12,619 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:12,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:12,619 INFO L82 PathProgramCache]: Analyzing trace with hash 716259208, now seen corresponding path program 42 times [2020-12-23 06:57:12,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:12,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257237720] [2020-12-23 06:57:12,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 231 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:13,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257237720] [2020-12-23 06:57:13,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302393530] [2020-12-23 06:57:13,027 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:13,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-12-23 06:57:13,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:13,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 06:57:13,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:13,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:13,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-12-23 06:57:13,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591828476] [2020-12-23 06:57:13,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:57:13,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:13,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:57:13,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:57:13,265 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2020-12-23 06:57:13,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:13,815 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2020-12-23 06:57:13,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 06:57:13,816 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2020-12-23 06:57:13,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:13,817 INFO L225 Difference]: With dead ends: 104 [2020-12-23 06:57:13,817 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 06:57:13,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=956, Invalid=1696, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:57:13,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 06:57:13,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2020-12-23 06:57:13,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 06:57:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-12-23 06:57:13,847 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 92 [2020-12-23 06:57:13,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:13,848 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-12-23 06:57:13,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:57:13,848 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-12-23 06:57:13,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-23 06:57:13,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:13,849 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:14,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:14,062 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:14,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:14,063 INFO L82 PathProgramCache]: Analyzing trace with hash 685359281, now seen corresponding path program 43 times [2020-12-23 06:57:14,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:14,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298983811] [2020-12-23 06:57:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 673 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:15,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298983811] [2020-12-23 06:57:15,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043616761] [2020-12-23 06:57:15,114 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:15,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 06:57:15,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:16,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:16,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2020-12-23 06:57:16,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988403556] [2020-12-23 06:57:16,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-23 06:57:16,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:16,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-23 06:57:16,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=4075, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 06:57:16,628 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 73 states. [2020-12-23 06:57:18,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:18,034 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2020-12-23 06:57:18,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 06:57:18,035 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 95 [2020-12-23 06:57:18,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:18,036 INFO L225 Difference]: With dead ends: 170 [2020-12-23 06:57:18,036 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 06:57:18,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2061, Invalid=7251, Unknown=0, NotChecked=0, Total=9312 [2020-12-23 06:57:18,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 06:57:18,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-12-23 06:57:18,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 06:57:18,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-12-23 06:57:18,051 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 95 [2020-12-23 06:57:18,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:18,051 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-12-23 06:57:18,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-23 06:57:18,051 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-12-23 06:57:18,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 06:57:18,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:18,051 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:18,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 06:57:18,252 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:18,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:18,253 INFO L82 PathProgramCache]: Analyzing trace with hash 375225836, now seen corresponding path program 44 times [2020-12-23 06:57:18,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:18,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114755719] [2020-12-23 06:57:18,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:18,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 253 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:18,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114755719] [2020-12-23 06:57:18,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341092167] [2020-12-23 06:57:18,643 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:18,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:57:18,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:18,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 06:57:18,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:18,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:18,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2020-12-23 06:57:18,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221509682] [2020-12-23 06:57:18,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:57:18,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:18,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:57:18,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:57:18,846 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2020-12-23 06:57:19,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:19,483 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2020-12-23 06:57:19,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 06:57:19,484 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2020-12-23 06:57:19,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:19,485 INFO L225 Difference]: With dead ends: 108 [2020-12-23 06:57:19,486 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 06:57:19,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1033, Invalid=1829, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:57:19,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 06:57:19,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2020-12-23 06:57:19,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 06:57:19,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-12-23 06:57:19,502 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 96 [2020-12-23 06:57:19,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:19,502 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-12-23 06:57:19,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:57:19,502 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-12-23 06:57:19,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 06:57:19,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:19,503 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:19,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 06:57:19,717 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:19,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:19,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1442170931, now seen corresponding path program 45 times [2020-12-23 06:57:19,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:19,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997477455] [2020-12-23 06:57:19,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 738 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:20,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997477455] [2020-12-23 06:57:20,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078865552] [2020-12-23 06:57:20,839 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:20,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-12-23 06:57:20,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:20,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 06:57:20,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:22,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:22,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2020-12-23 06:57:22,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941049760] [2020-12-23 06:57:22,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-23 06:57:22,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:22,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-23 06:57:22,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=4420, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:57:22,507 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 76 states. [2020-12-23 06:57:24,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:24,019 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2020-12-23 06:57:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 06:57:24,020 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 99 [2020-12-23 06:57:24,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:24,021 INFO L225 Difference]: With dead ends: 177 [2020-12-23 06:57:24,021 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 06:57:24,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2163 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2234, Invalid=7866, Unknown=0, NotChecked=0, Total=10100 [2020-12-23 06:57:24,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 06:57:24,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-12-23 06:57:24,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-23 06:57:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-12-23 06:57:24,035 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 99 [2020-12-23 06:57:24,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:24,035 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-12-23 06:57:24,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-23 06:57:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-12-23 06:57:24,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 06:57:24,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:24,036 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:24,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 06:57:24,244 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:24,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:24,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2002329720, now seen corresponding path program 46 times [2020-12-23 06:57:24,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:24,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403475394] [2020-12-23 06:57:24,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 276 proven. 829 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:24,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403475394] [2020-12-23 06:57:24,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356999603] [2020-12-23 06:57:24,651 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:24,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:57:24,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:24,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 06:57:24,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:24,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:24,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-12-23 06:57:24,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595724708] [2020-12-23 06:57:24,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 06:57:24,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:24,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 06:57:24,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:57:24,891 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2020-12-23 06:57:25,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:25,492 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2020-12-23 06:57:25,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 06:57:25,493 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2020-12-23 06:57:25,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:25,494 INFO L225 Difference]: With dead ends: 112 [2020-12-23 06:57:25,494 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 06:57:25,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1113, Invalid=1967, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:57:25,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 06:57:25,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2020-12-23 06:57:25,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 06:57:25,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-12-23 06:57:25,511 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 100 [2020-12-23 06:57:25,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:25,512 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-12-23 06:57:25,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 06:57:25,512 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-12-23 06:57:25,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-23 06:57:25,512 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:25,512 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:25,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:25,727 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:25,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:25,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1400905905, now seen corresponding path program 47 times [2020-12-23 06:57:25,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:25,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140683557] [2020-12-23 06:57:25,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 806 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:26,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140683557] [2020-12-23 06:57:26,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408530450] [2020-12-23 06:57:26,999 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:27,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-23 06:57:27,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:27,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 06:57:27,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:28,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:28,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2020-12-23 06:57:28,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946851796] [2020-12-23 06:57:28,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-23 06:57:28,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:28,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-23 06:57:28,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=4779, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 06:57:28,746 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 79 states. [2020-12-23 06:57:29,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:29,852 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2020-12-23 06:57:29,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 06:57:29,852 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 103 [2020-12-23 06:57:29,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:29,853 INFO L225 Difference]: With dead ends: 184 [2020-12-23 06:57:29,853 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 06:57:29,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2341 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2414, Invalid=8506, Unknown=0, NotChecked=0, Total=10920 [2020-12-23 06:57:29,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 06:57:29,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-12-23 06:57:29,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 06:57:29,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-12-23 06:57:29,865 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 103 [2020-12-23 06:57:29,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:29,865 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-12-23 06:57:29,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-23 06:57:29,866 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-12-23 06:57:29,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 06:57:29,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:29,866 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:30,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 06:57:30,076 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:30,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:30,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1078168852, now seen corresponding path program 48 times [2020-12-23 06:57:30,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:30,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608059729] [2020-12-23 06:57:30,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:30,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 300 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:30,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608059729] [2020-12-23 06:57:30,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541464665] [2020-12-23 06:57:30,558 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:30,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 06:57:30,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:30,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 06:57:30,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:30,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:30,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-12-23 06:57:30,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601944597] [2020-12-23 06:57:30,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:57:30,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:30,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:57:30,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:57:30,819 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2020-12-23 06:57:31,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:31,413 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2020-12-23 06:57:31,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 06:57:31,414 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2020-12-23 06:57:31,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:31,415 INFO L225 Difference]: With dead ends: 116 [2020-12-23 06:57:31,415 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 06:57:31,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1196, Invalid=2110, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:57:31,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 06:57:31,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2020-12-23 06:57:31,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 06:57:31,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-12-23 06:57:31,432 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 104 [2020-12-23 06:57:31,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:31,433 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-12-23 06:57:31,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:57:31,433 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-12-23 06:57:31,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-23 06:57:31,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:31,434 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:31,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 06:57:31,641 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:31,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:31,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1958010163, now seen corresponding path program 49 times [2020-12-23 06:57:31,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:31,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231207096] [2020-12-23 06:57:31,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 877 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:32,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231207096] [2020-12-23 06:57:32,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312645430] [2020-12-23 06:57:32,990 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:33,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 06:57:33,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:34,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:34,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 82 [2020-12-23 06:57:34,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042957818] [2020-12-23 06:57:34,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-23 06:57:34,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:34,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-23 06:57:34,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1490, Invalid=5152, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 06:57:34,930 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 82 states. [2020-12-23 06:57:36,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:36,708 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2020-12-23 06:57:36,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 06:57:36,708 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 107 [2020-12-23 06:57:36,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:36,709 INFO L225 Difference]: With dead ends: 191 [2020-12-23 06:57:36,709 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 06:57:36,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2526 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2601, Invalid=9171, Unknown=0, NotChecked=0, Total=11772 [2020-12-23 06:57:36,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 06:57:36,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-12-23 06:57:36,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-23 06:57:36,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-12-23 06:57:36,728 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 107 [2020-12-23 06:57:36,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:36,729 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-12-23 06:57:36,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-23 06:57:36,729 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-12-23 06:57:36,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-23 06:57:36,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:36,730 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:36,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:36,944 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:36,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:36,945 INFO L82 PathProgramCache]: Analyzing trace with hash 5103496, now seen corresponding path program 50 times [2020-12-23 06:57:36,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:36,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771772164] [2020-12-23 06:57:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 325 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:37,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771772164] [2020-12-23 06:57:37,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204521248] [2020-12-23 06:57:37,499 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:37,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:57:37,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:37,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 06:57:37,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:37,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:37,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:37,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 32 [2020-12-23 06:57:37,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160182246] [2020-12-23 06:57:37,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 06:57:37,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:37,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 06:57:37,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:57:37,752 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2020-12-23 06:57:38,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:38,438 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2020-12-23 06:57:38,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 06:57:38,439 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2020-12-23 06:57:38,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:38,440 INFO L225 Difference]: With dead ends: 120 [2020-12-23 06:57:38,440 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 06:57:38,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1282, Invalid=2258, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:57:38,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 06:57:38,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2020-12-23 06:57:38,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 06:57:38,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2020-12-23 06:57:38,458 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 108 [2020-12-23 06:57:38,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:38,459 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2020-12-23 06:57:38,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 06:57:38,459 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2020-12-23 06:57:38,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 06:57:38,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:38,459 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:38,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-23 06:57:38,673 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:38,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:38,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1719214257, now seen corresponding path program 51 times [2020-12-23 06:57:38,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:38,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794445858] [2020-12-23 06:57:38,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 951 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:40,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794445858] [2020-12-23 06:57:40,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410935598] [2020-12-23 06:57:40,085 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:40,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2020-12-23 06:57:40,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:40,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 06:57:40,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:42,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:42,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 85 [2020-12-23 06:57:42,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301751528] [2020-12-23 06:57:42,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-12-23 06:57:42,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:42,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-12-23 06:57:42,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=5539, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 06:57:42,151 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 85 states. [2020-12-23 06:57:43,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:43,960 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2020-12-23 06:57:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 06:57:43,960 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 111 [2020-12-23 06:57:43,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:43,961 INFO L225 Difference]: With dead ends: 198 [2020-12-23 06:57:43,961 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 06:57:43,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2718 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2795, Invalid=9861, Unknown=0, NotChecked=0, Total=12656 [2020-12-23 06:57:43,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 06:57:43,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-12-23 06:57:43,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 06:57:43,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2020-12-23 06:57:43,975 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 111 [2020-12-23 06:57:43,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:43,975 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2020-12-23 06:57:43,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-12-23 06:57:43,975 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2020-12-23 06:57:43,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-23 06:57:43,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:43,976 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:44,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:44,192 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:44,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:44,192 INFO L82 PathProgramCache]: Analyzing trace with hash -301398036, now seen corresponding path program 52 times [2020-12-23 06:57:44,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:44,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594462389] [2020-12-23 06:57:44,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 351 proven. 1054 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:44,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594462389] [2020-12-23 06:57:44,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082978082] [2020-12-23 06:57:44,756 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:44,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:57:44,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:44,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 06:57:44,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:44,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:44,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2020-12-23 06:57:44,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534032642] [2020-12-23 06:57:44,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 06:57:44,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:44,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 06:57:44,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:57:44,983 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2020-12-23 06:57:45,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:45,725 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2020-12-23 06:57:45,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 06:57:45,725 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2020-12-23 06:57:45,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:45,727 INFO L225 Difference]: With dead ends: 124 [2020-12-23 06:57:45,727 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 06:57:45,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1371, Invalid=2411, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 06:57:45,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 06:57:45,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2020-12-23 06:57:45,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-23 06:57:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2020-12-23 06:57:45,741 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 112 [2020-12-23 06:57:45,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:45,741 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2020-12-23 06:57:45,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 06:57:45,742 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2020-12-23 06:57:45,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-23 06:57:45,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:45,742 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:45,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-23 06:57:45,943 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:45,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:45,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1832545741, now seen corresponding path program 53 times [2020-12-23 06:57:45,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:45,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785199770] [2020-12-23 06:57:45,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1028 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:47,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785199770] [2020-12-23 06:57:47,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757569019] [2020-12-23 06:57:47,575 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:47,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2020-12-23 06:57:47,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:47,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 06:57:47,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:49,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:49,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 88 [2020-12-23 06:57:49,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675100862] [2020-12-23 06:57:49,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-12-23 06:57:49,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:49,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-12-23 06:57:49,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1716, Invalid=5940, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 06:57:49,851 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 88 states. [2020-12-23 06:57:51,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:51,976 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2020-12-23 06:57:51,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 06:57:51,976 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 115 [2020-12-23 06:57:51,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:51,977 INFO L225 Difference]: With dead ends: 205 [2020-12-23 06:57:51,977 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 06:57:51,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2917 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2996, Invalid=10576, Unknown=0, NotChecked=0, Total=13572 [2020-12-23 06:57:51,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 06:57:51,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-12-23 06:57:51,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 06:57:51,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-12-23 06:57:51,997 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 115 [2020-12-23 06:57:51,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:51,997 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-12-23 06:57:51,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-12-23 06:57:51,997 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-12-23 06:57:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-23 06:57:51,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:51,998 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:52,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 06:57:52,213 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:52,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:52,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1337868168, now seen corresponding path program 54 times [2020-12-23 06:57:52,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:52,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678295651] [2020-12-23 06:57:52,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 378 proven. 1135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:52,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678295651] [2020-12-23 06:57:52,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838244116] [2020-12-23 06:57:52,808 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:52,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2020-12-23 06:57:52,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:52,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 06:57:52,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:53,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:53,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2020-12-23 06:57:53,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346636547] [2020-12-23 06:57:53,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:57:53,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:53,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:57:53,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:57:53,134 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2020-12-23 06:57:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:54,007 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2020-12-23 06:57:54,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-23 06:57:54,008 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2020-12-23 06:57:54,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:54,009 INFO L225 Difference]: With dead ends: 128 [2020-12-23 06:57:54,009 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 06:57:54,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1463, Invalid=2569, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 06:57:54,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 06:57:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2020-12-23 06:57:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 06:57:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2020-12-23 06:57:54,031 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2020-12-23 06:57:54,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:54,031 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2020-12-23 06:57:54,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:57:54,031 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2020-12-23 06:57:54,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-23 06:57:54,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:54,032 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:54,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:54,247 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:54,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:54,247 INFO L82 PathProgramCache]: Analyzing trace with hash -861093711, now seen corresponding path program 55 times [2020-12-23 06:57:54,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:54,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000495545] [2020-12-23 06:57:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1108 proven. 488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:55,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000495545] [2020-12-23 06:57:55,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469547601] [2020-12-23 06:57:55,914 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:56,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 06:57:56,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:58,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:58,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 91 [2020-12-23 06:57:58,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542876060] [2020-12-23 06:57:58,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-12-23 06:57:58,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:58,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-12-23 06:57:58,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1835, Invalid=6355, Unknown=0, NotChecked=0, Total=8190 [2020-12-23 06:57:58,324 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 91 states. [2020-12-23 06:58:00,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:00,645 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2020-12-23 06:58:00,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 06:58:00,645 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 119 [2020-12-23 06:58:00,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:00,646 INFO L225 Difference]: With dead ends: 212 [2020-12-23 06:58:00,646 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 06:58:00,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3123 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3204, Invalid=11316, Unknown=0, NotChecked=0, Total=14520 [2020-12-23 06:58:00,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 06:58:00,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-12-23 06:58:00,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-23 06:58:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2020-12-23 06:58:00,676 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 119 [2020-12-23 06:58:00,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:00,676 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2020-12-23 06:58:00,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-12-23 06:58:00,677 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2020-12-23 06:58:00,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-23 06:58:00,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:00,677 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:00,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 06:58:00,893 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:00,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:00,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1093352684, now seen corresponding path program 56 times [2020-12-23 06:58:00,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:00,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429658667] [2020-12-23 06:58:00,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 406 proven. 1219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:01,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429658667] [2020-12-23 06:58:01,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567449915] [2020-12-23 06:58:01,529 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:01,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:58:01,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:01,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 06:58:01,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:01,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:01,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2020-12-23 06:58:01,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171952878] [2020-12-23 06:58:01,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 06:58:01,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:01,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 06:58:01,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:58:01,793 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2020-12-23 06:58:02,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:02,630 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2020-12-23 06:58:02,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 06:58:02,630 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2020-12-23 06:58:02,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:02,632 INFO L225 Difference]: With dead ends: 132 [2020-12-23 06:58:02,632 INFO L226 Difference]: Without dead ends: 130 [2020-12-23 06:58:02,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1558, Invalid=2732, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 06:58:02,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-23 06:58:02,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2020-12-23 06:58:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-23 06:58:02,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-12-23 06:58:02,655 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 120 [2020-12-23 06:58:02,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:02,655 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-12-23 06:58:02,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 06:58:02,655 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-12-23 06:58:02,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-23 06:58:02,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:02,656 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:02,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:02,872 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:02,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:02,872 INFO L82 PathProgramCache]: Analyzing trace with hash -957343539, now seen corresponding path program 57 times [2020-12-23 06:58:02,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:02,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393374686] [2020-12-23 06:58:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1191 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:04,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393374686] [2020-12-23 06:58:04,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542441073] [2020-12-23 06:58:04,714 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:04,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2020-12-23 06:58:04,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:04,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 06:58:04,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:07,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:07,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 94 [2020-12-23 06:58:07,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913846333] [2020-12-23 06:58:07,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-12-23 06:58:07,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:07,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-12-23 06:58:07,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1958, Invalid=6784, Unknown=0, NotChecked=0, Total=8742 [2020-12-23 06:58:07,297 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 94 states. [2020-12-23 06:58:09,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:09,896 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2020-12-23 06:58:09,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-23 06:58:09,896 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 123 [2020-12-23 06:58:09,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:09,897 INFO L225 Difference]: With dead ends: 219 [2020-12-23 06:58:09,897 INFO L226 Difference]: Without dead ends: 125 [2020-12-23 06:58:09,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3336 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3419, Invalid=12081, Unknown=0, NotChecked=0, Total=15500 [2020-12-23 06:58:09,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-23 06:58:09,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-12-23 06:58:09,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 06:58:09,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2020-12-23 06:58:09,923 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 123 [2020-12-23 06:58:09,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:09,923 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2020-12-23 06:58:09,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-12-23 06:58:09,924 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2020-12-23 06:58:09,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-23 06:58:09,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:09,924 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:10,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 06:58:10,125 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:10,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:10,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1559232632, now seen corresponding path program 58 times [2020-12-23 06:58:10,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:10,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926253323] [2020-12-23 06:58:10,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 435 proven. 1306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:10,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926253323] [2020-12-23 06:58:10,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775456210] [2020-12-23 06:58:10,806 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:10,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:58:10,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:10,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 06:58:10,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:11,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:11,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2020-12-23 06:58:11,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602628561] [2020-12-23 06:58:11,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 06:58:11,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:11,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 06:58:11,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:58:11,124 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2020-12-23 06:58:12,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:12,000 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2020-12-23 06:58:12,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-23 06:58:12,001 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2020-12-23 06:58:12,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:12,002 INFO L225 Difference]: With dead ends: 136 [2020-12-23 06:58:12,002 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 06:58:12,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1656, Invalid=2900, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:58:12,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 06:58:12,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2020-12-23 06:58:12,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-23 06:58:12,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2020-12-23 06:58:12,028 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 124 [2020-12-23 06:58:12,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:12,028 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2020-12-23 06:58:12,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 06:58:12,028 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2020-12-23 06:58:12,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-23 06:58:12,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:12,029 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:12,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 06:58:12,242 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:12,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:12,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1023213391, now seen corresponding path program 59 times [2020-12-23 06:58:12,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:12,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868777612] [2020-12-23 06:58:12,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1277 proven. 553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:14,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868777612] [2020-12-23 06:58:14,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135486829] [2020-12-23 06:58:14,243 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:14,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2020-12-23 06:58:14,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:14,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 06:58:14,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:17,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:17,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 97 [2020-12-23 06:58:17,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225057367] [2020-12-23 06:58:17,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-12-23 06:58:17,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:17,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-12-23 06:58:17,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2085, Invalid=7227, Unknown=0, NotChecked=0, Total=9312 [2020-12-23 06:58:17,093 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand 97 states. [2020-12-23 06:58:19,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:19,837 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2020-12-23 06:58:19,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 06:58:19,837 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 127 [2020-12-23 06:58:19,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:19,838 INFO L225 Difference]: With dead ends: 226 [2020-12-23 06:58:19,838 INFO L226 Difference]: Without dead ends: 129 [2020-12-23 06:58:19,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3556 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3641, Invalid=12871, Unknown=0, NotChecked=0, Total=16512 [2020-12-23 06:58:19,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-23 06:58:19,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2020-12-23 06:58:19,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-23 06:58:19,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2020-12-23 06:58:19,853 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 127 [2020-12-23 06:58:19,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:19,854 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2020-12-23 06:58:19,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-12-23 06:58:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2020-12-23 06:58:19,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-23 06:58:19,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:19,854 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:20,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:20,055 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:20,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:20,056 INFO L82 PathProgramCache]: Analyzing trace with hash 722145772, now seen corresponding path program 60 times [2020-12-23 06:58:20,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:20,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297861301] [2020-12-23 06:58:20,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 465 proven. 1396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:20,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297861301] [2020-12-23 06:58:20,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888599250] [2020-12-23 06:58:20,808 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:20,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-23 06:58:20,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:20,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 06:58:20,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:21,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:21,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2020-12-23 06:58:21,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983002474] [2020-12-23 06:58:21,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 06:58:21,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:21,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 06:58:21,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:58:21,172 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2020-12-23 06:58:22,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:22,199 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2020-12-23 06:58:22,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 06:58:22,200 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2020-12-23 06:58:22,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:22,201 INFO L225 Difference]: With dead ends: 140 [2020-12-23 06:58:22,201 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 06:58:22,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1757, Invalid=3073, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:58:22,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 06:58:22,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2020-12-23 06:58:22,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 06:58:22,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2020-12-23 06:58:22,216 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 128 [2020-12-23 06:58:22,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:22,216 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2020-12-23 06:58:22,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 06:58:22,216 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2020-12-23 06:58:22,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-23 06:58:22,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:22,217 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:22,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:22,418 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:22,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:22,419 INFO L82 PathProgramCache]: Analyzing trace with hash -41671731, now seen corresponding path program 61 times [2020-12-23 06:58:22,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:22,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040643774] [2020-12-23 06:58:22,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1366 proven. 587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:24,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040643774] [2020-12-23 06:58:24,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758117153] [2020-12-23 06:58:24,569 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:24,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:24,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 06:58:24,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:27,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:27,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 100 [2020-12-23 06:58:27,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339668610] [2020-12-23 06:58:27,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-12-23 06:58:27,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:27,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-12-23 06:58:27,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2216, Invalid=7684, Unknown=0, NotChecked=0, Total=9900 [2020-12-23 06:58:27,706 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 100 states. [2020-12-23 06:58:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:30,875 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2020-12-23 06:58:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-23 06:58:30,875 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 131 [2020-12-23 06:58:30,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:30,876 INFO L225 Difference]: With dead ends: 233 [2020-12-23 06:58:30,876 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 06:58:30,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3783 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=3870, Invalid=13686, Unknown=0, NotChecked=0, Total=17556 [2020-12-23 06:58:30,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 06:58:30,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-12-23 06:58:30,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-23 06:58:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2020-12-23 06:58:30,895 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 131 [2020-12-23 06:58:30,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:30,896 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2020-12-23 06:58:30,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-12-23 06:58:30,896 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2020-12-23 06:58:30,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-23 06:58:30,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:30,897 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:31,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:31,100 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:31,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:31,101 INFO L82 PathProgramCache]: Analyzing trace with hash 341516168, now seen corresponding path program 62 times [2020-12-23 06:58:31,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:31,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117538067] [2020-12-23 06:58:31,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 496 proven. 1489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:31,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117538067] [2020-12-23 06:58:31,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904157565] [2020-12-23 06:58:31,936 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:32,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:58:32,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:32,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 06:58:32,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:32,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:32,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 38 [2020-12-23 06:58:32,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257678782] [2020-12-23 06:58:32,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 06:58:32,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:32,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 06:58:32,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:58:32,258 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2020-12-23 06:58:33,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:33,362 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2020-12-23 06:58:33,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 06:58:33,364 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2020-12-23 06:58:33,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:33,365 INFO L225 Difference]: With dead ends: 144 [2020-12-23 06:58:33,365 INFO L226 Difference]: Without dead ends: 142 [2020-12-23 06:58:33,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1861, Invalid=3251, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 06:58:33,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-23 06:58:33,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2020-12-23 06:58:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 06:58:33,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2020-12-23 06:58:33,391 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 132 [2020-12-23 06:58:33,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:33,391 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2020-12-23 06:58:33,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 06:58:33,391 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2020-12-23 06:58:33,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 06:58:33,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:33,392 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:33,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:33,598 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:33,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:33,598 INFO L82 PathProgramCache]: Analyzing trace with hash -664543055, now seen corresponding path program 63 times [2020-12-23 06:58:33,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:33,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630385435] [2020-12-23 06:58:33,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1458 proven. 622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:35,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630385435] [2020-12-23 06:58:35,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956875616] [2020-12-23 06:58:35,958 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:36,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2020-12-23 06:58:36,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:36,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-23 06:58:36,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:39,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:39,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 103 [2020-12-23 06:58:39,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113858251] [2020-12-23 06:58:39,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-12-23 06:58:39,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:39,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-12-23 06:58:39,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=8155, Unknown=0, NotChecked=0, Total=10506 [2020-12-23 06:58:39,476 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand 103 states. [2020-12-23 06:58:42,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:42,995 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2020-12-23 06:58:42,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 06:58:42,995 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 135 [2020-12-23 06:58:42,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:42,996 INFO L225 Difference]: With dead ends: 240 [2020-12-23 06:58:42,996 INFO L226 Difference]: Without dead ends: 137 [2020-12-23 06:58:42,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4017 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=4106, Invalid=14526, Unknown=0, NotChecked=0, Total=18632 [2020-12-23 06:58:42,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-23 06:58:43,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-12-23 06:58:43,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 06:58:43,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2020-12-23 06:58:43,014 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 135 [2020-12-23 06:58:43,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:43,014 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2020-12-23 06:58:43,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-12-23 06:58:43,014 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2020-12-23 06:58:43,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-23 06:58:43,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:43,015 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:43,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:43,217 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1871742700, now seen corresponding path program 64 times [2020-12-23 06:58:43,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:43,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126640038] [2020-12-23 06:58:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 528 proven. 1585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:44,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126640038] [2020-12-23 06:58:44,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963339503] [2020-12-23 06:58:44,139 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:44,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:58:44,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:44,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 06:58:44,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:44,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:44,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2020-12-23 06:58:44,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227574804] [2020-12-23 06:58:44,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 06:58:44,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:44,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 06:58:44,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:58:44,517 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2020-12-23 06:58:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:45,737 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2020-12-23 06:58:45,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-23 06:58:45,738 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2020-12-23 06:58:45,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:45,739 INFO L225 Difference]: With dead ends: 148 [2020-12-23 06:58:45,739 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 06:58:45,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1968, Invalid=3434, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 06:58:45,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 06:58:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2020-12-23 06:58:45,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-23 06:58:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2020-12-23 06:58:45,758 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 136 [2020-12-23 06:58:45,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:45,758 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2020-12-23 06:58:45,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 06:58:45,758 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2020-12-23 06:58:45,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-23 06:58:45,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:45,759 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:45,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-23 06:58:45,960 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:45,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:45,960 INFO L82 PathProgramCache]: Analyzing trace with hash -468807987, now seen corresponding path program 65 times [2020-12-23 06:58:45,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:45,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751576632] [2020-12-23 06:58:45,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1553 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:48,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751576632] [2020-12-23 06:58:48,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583886644] [2020-12-23 06:58:48,613 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:48,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2020-12-23 06:58:48,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:48,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 06:58:48,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:52,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:52,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 106 [2020-12-23 06:58:52,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195819216] [2020-12-23 06:58:52,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-12-23 06:58:52,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:52,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-12-23 06:58:52,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2490, Invalid=8640, Unknown=0, NotChecked=0, Total=11130 [2020-12-23 06:58:52,413 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand 106 states. [2020-12-23 06:58:56,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:56,400 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2020-12-23 06:58:56,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 06:58:56,401 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 139 [2020-12-23 06:58:56,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:56,401 INFO L225 Difference]: With dead ends: 247 [2020-12-23 06:58:56,402 INFO L226 Difference]: Without dead ends: 141 [2020-12-23 06:58:56,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4258 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=4349, Invalid=15391, Unknown=0, NotChecked=0, Total=19740 [2020-12-23 06:58:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-23 06:58:56,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2020-12-23 06:58:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-23 06:58:56,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-12-23 06:58:56,426 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 139 [2020-12-23 06:58:56,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:56,426 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-12-23 06:58:56,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-12-23 06:58:56,426 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-12-23 06:58:56,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-23 06:58:56,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:56,427 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:56,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-23 06:58:56,641 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:56,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:56,641 INFO L82 PathProgramCache]: Analyzing trace with hash 733454216, now seen corresponding path program 66 times [2020-12-23 06:58:56,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:56,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750748927] [2020-12-23 06:58:56,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 561 proven. 1684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:57,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750748927] [2020-12-23 06:58:57,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779908796] [2020-12-23 06:58:57,849 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:58,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2020-12-23 06:58:58,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:58,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 06:58:58,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:58,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:58,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2020-12-23 06:58:58,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717950069] [2020-12-23 06:58:58,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 06:58:58,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:58,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 06:58:58,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:58:58,414 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2020-12-23 06:58:59,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:59,757 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2020-12-23 06:58:59,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 06:58:59,758 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2020-12-23 06:58:59,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:59,759 INFO L225 Difference]: With dead ends: 152 [2020-12-23 06:58:59,759 INFO L226 Difference]: Without dead ends: 150 [2020-12-23 06:58:59,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2078, Invalid=3622, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:58:59,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-23 06:58:59,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2020-12-23 06:58:59,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-23 06:58:59,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-12-23 06:58:59,779 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 140 [2020-12-23 06:58:59,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:59,779 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-12-23 06:58:59,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 06:58:59,780 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-12-23 06:58:59,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-23 06:58:59,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:59,780 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:59,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:59,981 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:59,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:59,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1840734385, now seen corresponding path program 67 times [2020-12-23 06:58:59,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:59,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197590101] [2020-12-23 06:58:59,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1651 proven. 695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:03,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197590101] [2020-12-23 06:59:03,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594448314] [2020-12-23 06:59:03,124 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:03,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 06:59:03,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:07,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:07,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 109 [2020-12-23 06:59:07,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791043727] [2020-12-23 06:59:07,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 109 states [2020-12-23 06:59:07,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:07,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2020-12-23 06:59:07,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2633, Invalid=9139, Unknown=0, NotChecked=0, Total=11772 [2020-12-23 06:59:07,583 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 109 states. [2020-12-23 06:59:12,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:12,079 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2020-12-23 06:59:12,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-23 06:59:12,079 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 143 [2020-12-23 06:59:12,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:12,080 INFO L225 Difference]: With dead ends: 254 [2020-12-23 06:59:12,080 INFO L226 Difference]: Without dead ends: 145 [2020-12-23 06:59:12,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4506 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=4599, Invalid=16281, Unknown=0, NotChecked=0, Total=20880 [2020-12-23 06:59:12,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-23 06:59:12,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-12-23 06:59:12,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 06:59:12,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2020-12-23 06:59:12,107 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 143 [2020-12-23 06:59:12,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:12,107 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2020-12-23 06:59:12,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 109 states. [2020-12-23 06:59:12,107 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2020-12-23 06:59:12,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-23 06:59:12,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:12,108 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:12,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-23 06:59:12,323 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:12,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:12,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1532781588, now seen corresponding path program 68 times [2020-12-23 06:59:12,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:12,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99919160] [2020-12-23 06:59:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 595 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:13,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99919160] [2020-12-23 06:59:13,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688651078] [2020-12-23 06:59:13,488 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:13,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:59:13,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:13,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-23 06:59:13,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:13,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:13,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2020-12-23 06:59:13,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20816277] [2020-12-23 06:59:13,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 06:59:13,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:13,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 06:59:13,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:59:13,970 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2020-12-23 06:59:15,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:15,463 INFO L93 Difference]: Finished difference Result 156 states and 157 transitions. [2020-12-23 06:59:15,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-23 06:59:15,465 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2020-12-23 06:59:15,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:15,466 INFO L225 Difference]: With dead ends: 156 [2020-12-23 06:59:15,466 INFO L226 Difference]: Without dead ends: 154 [2020-12-23 06:59:15,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2191, Invalid=3815, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 06:59:15,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-23 06:59:15,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2020-12-23 06:59:15,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-12-23 06:59:15,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2020-12-23 06:59:15,505 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 144 [2020-12-23 06:59:15,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:15,505 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2020-12-23 06:59:15,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 06:59:15,505 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2020-12-23 06:59:15,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-23 06:59:15,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:15,506 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:15,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-23 06:59:15,714 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:15,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:15,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1000823245, now seen corresponding path program 69 times [2020-12-23 06:59:15,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:15,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127697085] [2020-12-23 06:59:15,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1752 proven. 733 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:19,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127697085] [2020-12-23 06:59:19,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343875876] [2020-12-23 06:59:19,175 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:19,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2020-12-23 06:59:19,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:19,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 06:59:19,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:24,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:24,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 112 [2020-12-23 06:59:24,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033535749] [2020-12-23 06:59:24,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 112 states [2020-12-23 06:59:24,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:24,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2020-12-23 06:59:24,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2780, Invalid=9652, Unknown=0, NotChecked=0, Total=12432 [2020-12-23 06:59:24,271 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 112 states. [2020-12-23 06:59:29,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:29,060 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2020-12-23 06:59:29,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 06:59:29,060 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 147 [2020-12-23 06:59:29,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:29,062 INFO L225 Difference]: With dead ends: 261 [2020-12-23 06:59:29,062 INFO L226 Difference]: Without dead ends: 149 [2020-12-23 06:59:29,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4761 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=4856, Invalid=17196, Unknown=0, NotChecked=0, Total=22052 [2020-12-23 06:59:29,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-23 06:59:29,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-12-23 06:59:29,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-12-23 06:59:29,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2020-12-23 06:59:29,093 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 147 [2020-12-23 06:59:29,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:29,094 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2020-12-23 06:59:29,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 112 states. [2020-12-23 06:59:29,094 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2020-12-23 06:59:29,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-23 06:59:29,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:29,095 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:29,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-12-23 06:59:29,308 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:29,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:29,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1597865864, now seen corresponding path program 70 times [2020-12-23 06:59:29,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:29,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106317339] [2020-12-23 06:59:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:30,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 630 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:30,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106317339] [2020-12-23 06:59:30,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375876194] [2020-12-23 06:59:30,429 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:30,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:59:30,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:30,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 06:59:30,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:30,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:30,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 42 [2020-12-23 06:59:30,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573989846] [2020-12-23 06:59:30,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 06:59:30,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:30,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 06:59:30,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=973, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:59:30,888 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2020-12-23 06:59:32,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:32,264 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2020-12-23 06:59:32,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-23 06:59:32,265 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2020-12-23 06:59:32,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:32,266 INFO L225 Difference]: With dead ends: 160 [2020-12-23 06:59:32,266 INFO L226 Difference]: Without dead ends: 158 [2020-12-23 06:59:32,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2307, Invalid=4013, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 06:59:32,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-23 06:59:32,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2020-12-23 06:59:32,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-23 06:59:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2020-12-23 06:59:32,286 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 148 [2020-12-23 06:59:32,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:32,286 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2020-12-23 06:59:32,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 06:59:32,286 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2020-12-23 06:59:32,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-23 06:59:32,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:32,287 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:32,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:32,487 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:32,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:32,488 INFO L82 PathProgramCache]: Analyzing trace with hash 904233137, now seen corresponding path program 71 times [2020-12-23 06:59:32,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:32,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369635656] [2020-12-23 06:59:32,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1856 proven. 772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:36,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369635656] [2020-12-23 06:59:36,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327473952] [2020-12-23 06:59:36,258 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:36,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2020-12-23 06:59:36,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:36,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 06:59:36,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:41,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:41,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 115 [2020-12-23 06:59:41,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363301449] [2020-12-23 06:59:41,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 115 states [2020-12-23 06:59:41,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:41,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2020-12-23 06:59:41,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2931, Invalid=10179, Unknown=0, NotChecked=0, Total=13110 [2020-12-23 06:59:41,562 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand 115 states. [2020-12-23 06:59:46,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:46,417 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2020-12-23 06:59:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-23 06:59:46,417 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 151 [2020-12-23 06:59:46,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:46,418 INFO L225 Difference]: With dead ends: 268 [2020-12-23 06:59:46,418 INFO L226 Difference]: Without dead ends: 153 [2020-12-23 06:59:46,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5023 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=5120, Invalid=18136, Unknown=0, NotChecked=0, Total=23256 [2020-12-23 06:59:46,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-23 06:59:46,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2020-12-23 06:59:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 06:59:46,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2020-12-23 06:59:46,450 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 151 [2020-12-23 06:59:46,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:46,451 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2020-12-23 06:59:46,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 115 states. [2020-12-23 06:59:46,451 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2020-12-23 06:59:46,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-23 06:59:46,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:46,452 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:46,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:46,653 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:46,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:46,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1305718548, now seen corresponding path program 72 times [2020-12-23 06:59:46,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:46,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001858875] [2020-12-23 06:59:46,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 666 proven. 1999 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:48,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001858875] [2020-12-23 06:59:48,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257283237] [2020-12-23 06:59:48,064 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:48,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-23 06:59:48,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:48,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-23 06:59:48,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:48,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:48,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2020-12-23 06:59:48,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172221549] [2020-12-23 06:59:48,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 06:59:48,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:48,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 06:59:48,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:59:48,554 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 43 states. [2020-12-23 06:59:50,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:50,115 INFO L93 Difference]: Finished difference Result 164 states and 165 transitions. [2020-12-23 06:59:50,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-23 06:59:50,117 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 152 [2020-12-23 06:59:50,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:50,118 INFO L225 Difference]: With dead ends: 164 [2020-12-23 06:59:50,118 INFO L226 Difference]: Without dead ends: 162 [2020-12-23 06:59:50,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2426, Invalid=4216, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 06:59:50,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-23 06:59:50,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 156. [2020-12-23 06:59:50,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-12-23 06:59:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2020-12-23 06:59:50,153 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 152 [2020-12-23 06:59:50,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:50,154 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2020-12-23 06:59:50,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 06:59:50,154 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2020-12-23 06:59:50,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-23 06:59:50,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:50,155 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:50,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:50,369 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:50,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:50,369 INFO L82 PathProgramCache]: Analyzing trace with hash 862356685, now seen corresponding path program 73 times [2020-12-23 06:59:50,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:50,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763940866] [2020-12-23 06:59:50,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 1963 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:54,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763940866] [2020-12-23 06:59:54,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521125206] [2020-12-23 06:59:54,379 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:54,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-23 06:59:54,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:00,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:00,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 118 [2020-12-23 07:00:00,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142430830] [2020-12-23 07:00:00,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-12-23 07:00:00,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:00,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-12-23 07:00:00,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3086, Invalid=10720, Unknown=0, NotChecked=0, Total=13806 [2020-12-23 07:00:00,079 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand 118 states. [2020-12-23 07:00:05,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:05,652 INFO L93 Difference]: Finished difference Result 275 states and 277 transitions. [2020-12-23 07:00:05,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-23 07:00:05,652 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 155 [2020-12-23 07:00:05,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:05,653 INFO L225 Difference]: With dead ends: 275 [2020-12-23 07:00:05,653 INFO L226 Difference]: Without dead ends: 157 [2020-12-23 07:00:05,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5292 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=5391, Invalid=19101, Unknown=0, NotChecked=0, Total=24492 [2020-12-23 07:00:05,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-23 07:00:05,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-12-23 07:00:05,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 07:00:05,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2020-12-23 07:00:05,701 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 155 [2020-12-23 07:00:05,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:05,701 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2020-12-23 07:00:05,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-12-23 07:00:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2020-12-23 07:00:05,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-23 07:00:05,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:05,702 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:05,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-23 07:00:05,903 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:05,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:05,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1828405368, now seen corresponding path program 74 times [2020-12-23 07:00:05,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:05,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071534744] [2020-12-23 07:00:05,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 703 proven. 2110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:07,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071534744] [2020-12-23 07:00:07,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526356509] [2020-12-23 07:00:07,317 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:07,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:00:07,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:07,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-23 07:00:07,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 741 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:07,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:07,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 44 [2020-12-23 07:00:07,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096783709] [2020-12-23 07:00:07,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 07:00:07,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:07,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 07:00:07,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=1064, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 07:00:07,742 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2020-12-23 07:00:09,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:09,438 INFO L93 Difference]: Finished difference Result 168 states and 169 transitions. [2020-12-23 07:00:09,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-12-23 07:00:09,439 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2020-12-23 07:00:09,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:09,440 INFO L225 Difference]: With dead ends: 168 [2020-12-23 07:00:09,440 INFO L226 Difference]: Without dead ends: 166 [2020-12-23 07:00:09,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2548, Invalid=4424, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 07:00:09,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-23 07:00:09,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2020-12-23 07:00:09,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-23 07:00:09,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2020-12-23 07:00:09,483 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 156 [2020-12-23 07:00:09,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:09,483 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2020-12-23 07:00:09,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 07:00:09,483 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2020-12-23 07:00:09,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-23 07:00:09,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:09,484 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:09,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:09,698 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:09,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:09,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1244249935, now seen corresponding path program 75 times [2020-12-23 07:00:09,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:09,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090996580] [2020-12-23 07:00:09,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2073 proven. 853 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:13,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090996580] [2020-12-23 07:00:13,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509116332] [2020-12-23 07:00:13,766 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:13,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2020-12-23 07:00:13,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:13,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-23 07:00:13,984 INFO L286 TraceCheckSpWp]: Computing forward predicates...