/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:22:28,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:22:28,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:22:28,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:22:28,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:22:28,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:22:28,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:22:28,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:22:28,700 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:22:28,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:22:28,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:22:28,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:22:28,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:22:28,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:22:28,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:22:28,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:22:28,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:22:28,709 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:22:28,711 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:22:28,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:22:28,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:22:28,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:22:28,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:22:28,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:22:28,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:22:28,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:22:28,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:22:28,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:22:28,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:22:28,758 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:22:28,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:22:28,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:22:28,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:22:28,760 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:22:28,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:22:28,760 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:22:28,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:22:28,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:22:28,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:22:28,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:22:28,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:22:28,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:22:28,762 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:22:28,762 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:22:28,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:22:28,762 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:22:28,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:22:28,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:22:28,763 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:22:28,763 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:22:28,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:22:28,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:22:28,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:22:28,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:22:28,764 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:22:28,764 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:22:28,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:22:28,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:22:28,765 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:22:29,042 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:22:29,055 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:22:29,058 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:22:29,060 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:22:29,060 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:22:29,061 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-1.i [2019-11-23 20:22:29,132 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83f90de1d/12cd2d922a7144269a6bc9fb521aad04/FLAG4f8adf606 [2019-11-23 20:22:29,558 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:22:29,560 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy5_ground-1.i [2019-11-23 20:22:29,567 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83f90de1d/12cd2d922a7144269a6bc9fb521aad04/FLAG4f8adf606 [2019-11-23 20:22:29,986 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83f90de1d/12cd2d922a7144269a6bc9fb521aad04 [2019-11-23 20:22:29,995 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:22:29,997 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:22:29,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:22:29,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:22:30,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:22:30,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:22:29" (1/1) ... [2019-11-23 20:22:30,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b695465 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:30, skipping insertion in model container [2019-11-23 20:22:30,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:22:29" (1/1) ... [2019-11-23 20:22:30,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:22:30,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:22:30,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:22:30,227 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:22:30,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:22:30,269 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:22:30,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:30 WrapperNode [2019-11-23 20:22:30,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:22:30,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:22:30,271 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:22:30,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:22:30,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:30" (1/1) ... [2019-11-23 20:22:30,363 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:30" (1/1) ... [2019-11-23 20:22:30,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:22:30,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:22:30,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:22:30,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:22:30,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:30" (1/1) ... [2019-11-23 20:22:30,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:30" (1/1) ... [2019-11-23 20:22:30,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:30" (1/1) ... [2019-11-23 20:22:30,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:30" (1/1) ... [2019-11-23 20:22:30,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:30" (1/1) ... [2019-11-23 20:22:30,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:30" (1/1) ... [2019-11-23 20:22:30,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:30" (1/1) ... [2019-11-23 20:22:30,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:22:30,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:22:30,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:22:30,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:22:30,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:22:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:22:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:22:30,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:22:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:22:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:22:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:22:30,890 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:22:30,890 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-23 20:22:30,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:22:30 BoogieIcfgContainer [2019-11-23 20:22:30,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:22:30,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:22:30,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:22:30,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:22:30,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:22:29" (1/3) ... [2019-11-23 20:22:30,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e6116b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:22:30, skipping insertion in model container [2019-11-23 20:22:30,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:30" (2/3) ... [2019-11-23 20:22:30,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e6116b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:22:30, skipping insertion in model container [2019-11-23 20:22:30,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:22:30" (3/3) ... [2019-11-23 20:22:30,900 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-1.i [2019-11-23 20:22:30,909 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:22:30,916 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:22:30,927 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:22:30,948 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:22:30,949 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:22:30,949 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:22:30,949 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:22:30,949 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:22:30,949 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:22:30,949 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:22:30,950 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:22:30,962 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-23 20:22:30,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:22:30,968 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:30,969 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:30,970 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:30,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:30,974 INFO L82 PathProgramCache]: Analyzing trace with hash -18882701, now seen corresponding path program 1 times [2019-11-23 20:22:30,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:30,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444377931] [2019-11-23 20:22:30,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:22:31,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444377931] [2019-11-23 20:22:31,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:22:31,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:22:31,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316444861] [2019-11-23 20:22:31,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:22:31,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:31,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:22:31,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:22:31,184 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2019-11-23 20:22:31,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:31,244 INFO L93 Difference]: Finished difference Result 58 states and 86 transitions. [2019-11-23 20:22:31,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:22:31,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:22:31,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:31,259 INFO L225 Difference]: With dead ends: 58 [2019-11-23 20:22:31,259 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:22:31,266 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:22:31,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:22:31,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-23 20:22:31,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:22:31,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2019-11-23 20:22:31,315 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2019-11-23 20:22:31,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:31,315 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2019-11-23 20:22:31,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:22:31,317 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2019-11-23 20:22:31,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:22:31,318 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:31,318 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:31,320 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:31,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:31,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1592499797, now seen corresponding path program 1 times [2019-11-23 20:22:31,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:31,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218678315] [2019-11-23 20:22:31,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:22:31,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218678315] [2019-11-23 20:22:31,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:22:31,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:22:31,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900610840] [2019-11-23 20:22:31,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:22:31,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:31,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:22:31,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:22:31,438 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 3 states. [2019-11-23 20:22:31,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:31,529 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2019-11-23 20:22:31,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:22:31,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 20:22:31,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:31,531 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:22:31,531 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 20:22:31,532 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:22:31,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 20:22:31,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2019-11-23 20:22:31,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:22:31,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-11-23 20:22:31,540 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2019-11-23 20:22:31,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:31,540 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-11-23 20:22:31,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:22:31,541 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-11-23 20:22:31,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:22:31,542 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:31,542 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:31,542 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:31,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:31,543 INFO L82 PathProgramCache]: Analyzing trace with hash 722749857, now seen corresponding path program 1 times [2019-11-23 20:22:31,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:31,544 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360962183] [2019-11-23 20:22:31,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:22:31,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360962183] [2019-11-23 20:22:31,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541942251] [2019-11-23 20:22:31,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:31,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:22:31,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:22:31,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:31,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:22:31,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968632359] [2019-11-23 20:22:31,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:22:31,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:31,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:22:31,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:22:31,798 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 5 states. [2019-11-23 20:22:31,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:31,835 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2019-11-23 20:22:31,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:22:31,836 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2019-11-23 20:22:31,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:31,837 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:22:31,837 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:22:31,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:22:31,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:22:31,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-11-23 20:22:31,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:22:31,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-11-23 20:22:31,844 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 29 [2019-11-23 20:22:31,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:31,845 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-11-23 20:22:31,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:22:31,845 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-11-23 20:22:31,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:22:31,846 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:31,847 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:32,050 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:32,051 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:32,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:32,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1187353633, now seen corresponding path program 2 times [2019-11-23 20:22:32,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:32,053 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227250201] [2019-11-23 20:22:32,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:22:32,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227250201] [2019-11-23 20:22:32,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131421488] [2019-11-23 20:22:32,152 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:32,244 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:22:32,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:32,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:22:32,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:22:32,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:32,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:22:32,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003229076] [2019-11-23 20:22:32,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:22:32,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:32,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:22:32,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:22:32,274 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2019-11-23 20:22:32,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:32,302 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2019-11-23 20:22:32,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:22:32,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-11-23 20:22:32,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:32,303 INFO L225 Difference]: With dead ends: 64 [2019-11-23 20:22:32,303 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 20:22:32,304 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:22:32,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 20:22:32,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-11-23 20:22:32,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:22:32,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2019-11-23 20:22:32,312 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 31 [2019-11-23 20:22:32,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:32,312 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2019-11-23 20:22:32,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:22:32,313 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2019-11-23 20:22:32,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:22:32,313 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:32,314 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:32,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:32,516 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:32,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:32,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1449195165, now seen corresponding path program 3 times [2019-11-23 20:22:32,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:32,517 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437429884] [2019-11-23 20:22:32,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:22:32,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437429884] [2019-11-23 20:22:32,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545491593] [2019-11-23 20:22:32,592 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:32,654 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:22:32,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:32,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:22:32,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:22:32,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:32,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:22:32,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907470892] [2019-11-23 20:22:32,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:22:32,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:32,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:22:32,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:22:32,693 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 8 states. [2019-11-23 20:22:32,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:32,864 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2019-11-23 20:22:32,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:22:32,865 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 20:22:32,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:32,866 INFO L225 Difference]: With dead ends: 81 [2019-11-23 20:22:32,866 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:22:32,866 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:22:32,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:22:32,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2019-11-23 20:22:32,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:22:32,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2019-11-23 20:22:32,874 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 33 [2019-11-23 20:22:32,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:32,874 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2019-11-23 20:22:32,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:22:32,874 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2019-11-23 20:22:32,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:22:32,876 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:32,876 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:33,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:33,080 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:33,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:33,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1788474833, now seen corresponding path program 4 times [2019-11-23 20:22:33,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:33,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684604123] [2019-11-23 20:22:33,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 20:22:33,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684604123] [2019-11-23 20:22:33,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000677609] [2019-11-23 20:22:33,192 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:33,261 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:22:33,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:33,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:22:33,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 20:22:33,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:33,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 20:22:33,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903751018] [2019-11-23 20:22:33,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:22:33,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:33,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:22:33,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:22:33,306 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 10 states. [2019-11-23 20:22:33,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:33,484 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2019-11-23 20:22:33,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:22:33,484 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2019-11-23 20:22:33,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:33,485 INFO L225 Difference]: With dead ends: 103 [2019-11-23 20:22:33,486 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 20:22:33,486 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:22:33,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 20:22:33,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2019-11-23 20:22:33,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 20:22:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2019-11-23 20:22:33,509 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 45 [2019-11-23 20:22:33,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:33,510 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2019-11-23 20:22:33,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:22:33,510 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2019-11-23 20:22:33,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:22:33,511 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:33,512 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:33,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:33,724 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:33,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:33,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1417844485, now seen corresponding path program 5 times [2019-11-23 20:22:33,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:33,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209494072] [2019-11-23 20:22:33,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-23 20:22:33,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209494072] [2019-11-23 20:22:33,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666977607] [2019-11-23 20:22:33,849 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:35,813 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:22:35,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:35,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:22:35,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-11-23 20:22:35,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:35,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 20:22:35,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173102598] [2019-11-23 20:22:35,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:22:35,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:35,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:22:35,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:22:35,883 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 12 states. [2019-11-23 20:22:36,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:36,052 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2019-11-23 20:22:36,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:22:36,053 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-23 20:22:36,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:36,054 INFO L225 Difference]: With dead ends: 125 [2019-11-23 20:22:36,054 INFO L226 Difference]: Without dead ends: 78 [2019-11-23 20:22:36,055 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:22:36,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-23 20:22:36,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2019-11-23 20:22:36,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:22:36,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2019-11-23 20:22:36,062 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 57 [2019-11-23 20:22:36,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:36,063 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2019-11-23 20:22:36,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:22:36,063 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2019-11-23 20:22:36,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:22:36,064 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:36,064 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:36,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:36,271 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:36,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:36,272 INFO L82 PathProgramCache]: Analyzing trace with hash -371467719, now seen corresponding path program 6 times [2019-11-23 20:22:36,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:36,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750768872] [2019-11-23 20:22:36,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-23 20:22:36,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750768872] [2019-11-23 20:22:36,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41821742] [2019-11-23 20:22:36,441 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:36,736 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:22:36,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:36,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:22:36,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-11-23 20:22:36,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:36,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-23 20:22:36,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929091826] [2019-11-23 20:22:36,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:22:36,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:36,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:22:36,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:22:36,831 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand 16 states. [2019-11-23 20:22:37,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:37,128 INFO L93 Difference]: Finished difference Result 152 states and 174 transitions. [2019-11-23 20:22:37,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:22:37,129 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2019-11-23 20:22:37,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:37,130 INFO L225 Difference]: With dead ends: 152 [2019-11-23 20:22:37,130 INFO L226 Difference]: Without dead ends: 95 [2019-11-23 20:22:37,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:22:37,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-23 20:22:37,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2019-11-23 20:22:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-23 20:22:37,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2019-11-23 20:22:37,140 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 69 [2019-11-23 20:22:37,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:37,141 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2019-11-23 20:22:37,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:22:37,141 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2019-11-23 20:22:37,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:22:37,142 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:37,142 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:37,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:37,348 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:37,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:37,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1131125987, now seen corresponding path program 7 times [2019-11-23 20:22:37,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:37,349 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563129556] [2019-11-23 20:22:37,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-23 20:22:37,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563129556] [2019-11-23 20:22:37,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418663220] [2019-11-23 20:22:37,501 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:37,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:22:37,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-23 20:22:37,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:37,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:22:37,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197661182] [2019-11-23 20:22:37,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:22:37,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:37,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:22:37,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:22:37,592 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand 11 states. [2019-11-23 20:22:37,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:37,631 INFO L93 Difference]: Finished difference Result 174 states and 186 transitions. [2019-11-23 20:22:37,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:22:37,632 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 91 [2019-11-23 20:22:37,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:37,633 INFO L225 Difference]: With dead ends: 174 [2019-11-23 20:22:37,633 INFO L226 Difference]: Without dead ends: 97 [2019-11-23 20:22:37,634 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:22:37,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-23 20:22:37,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2019-11-23 20:22:37,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-23 20:22:37,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2019-11-23 20:22:37,642 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 91 [2019-11-23 20:22:37,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:37,643 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2019-11-23 20:22:37,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:22:37,643 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2019-11-23 20:22:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-23 20:22:37,644 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:37,645 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:37,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:37,848 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:37,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:37,849 INFO L82 PathProgramCache]: Analyzing trace with hash -10205535, now seen corresponding path program 8 times [2019-11-23 20:22:37,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:37,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087455039] [2019-11-23 20:22:37,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-23 20:22:37,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087455039] [2019-11-23 20:22:37,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429292034] [2019-11-23 20:22:37,994 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:38,058 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:22:38,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:38,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:22:38,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-23 20:22:38,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:38,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:22:38,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359803970] [2019-11-23 20:22:38,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:22:38,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:38,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:22:38,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:22:38,091 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand 12 states. [2019-11-23 20:22:38,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:38,137 INFO L93 Difference]: Finished difference Result 176 states and 188 transitions. [2019-11-23 20:22:38,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:22:38,138 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 93 [2019-11-23 20:22:38,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:38,139 INFO L225 Difference]: With dead ends: 176 [2019-11-23 20:22:38,139 INFO L226 Difference]: Without dead ends: 99 [2019-11-23 20:22:38,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:22:38,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-23 20:22:38,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2019-11-23 20:22:38,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-23 20:22:38,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2019-11-23 20:22:38,166 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 93 [2019-11-23 20:22:38,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:38,167 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2019-11-23 20:22:38,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:22:38,167 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2019-11-23 20:22:38,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 20:22:38,174 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:38,174 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:38,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:38,375 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:38,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:38,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1613137697, now seen corresponding path program 9 times [2019-11-23 20:22:38,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:38,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977866689] [2019-11-23 20:22:38,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-23 20:22:38,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977866689] [2019-11-23 20:22:38,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021644490] [2019-11-23 20:22:38,530 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:41,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 20:22:41,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:41,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:22:41,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 20:22:41,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:41,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2019-11-23 20:22:41,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870473394] [2019-11-23 20:22:41,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:22:41,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:41,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:22:41,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:22:41,645 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand 19 states. [2019-11-23 20:22:41,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:41,864 INFO L93 Difference]: Finished difference Result 193 states and 210 transitions. [2019-11-23 20:22:41,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:22:41,865 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 95 [2019-11-23 20:22:41,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:41,865 INFO L225 Difference]: With dead ends: 193 [2019-11-23 20:22:41,866 INFO L226 Difference]: Without dead ends: 116 [2019-11-23 20:22:41,866 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:22:41,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-23 20:22:41,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2019-11-23 20:22:41,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-11-23 20:22:41,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2019-11-23 20:22:41,873 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 95 [2019-11-23 20:22:41,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:41,874 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2019-11-23 20:22:41,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:22:41,874 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2019-11-23 20:22:41,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-23 20:22:41,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:41,876 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:42,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:42,082 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:42,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:42,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1333054189, now seen corresponding path program 10 times [2019-11-23 20:22:42,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:42,083 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256868896] [2019-11-23 20:22:42,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2019-11-23 20:22:42,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256868896] [2019-11-23 20:22:42,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790886322] [2019-11-23 20:22:42,223 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:42,312 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:22:42,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:42,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:22:42,315 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2019-11-23 20:22:42,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:42,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:22:42,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631360253] [2019-11-23 20:22:42,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:22:42,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:42,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:22:42,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:22:42,336 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand 14 states. [2019-11-23 20:22:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:42,388 INFO L93 Difference]: Finished difference Result 200 states and 212 transitions. [2019-11-23 20:22:42,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:22:42,390 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 107 [2019-11-23 20:22:42,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:42,391 INFO L225 Difference]: With dead ends: 200 [2019-11-23 20:22:42,391 INFO L226 Difference]: Without dead ends: 113 [2019-11-23 20:22:42,392 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:22:42,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-23 20:22:42,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2019-11-23 20:22:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 20:22:42,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2019-11-23 20:22:42,397 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 107 [2019-11-23 20:22:42,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:42,398 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2019-11-23 20:22:42,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:22:42,398 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2019-11-23 20:22:42,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-23 20:22:42,399 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:42,399 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:42,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:42,611 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:42,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:42,612 INFO L82 PathProgramCache]: Analyzing trace with hash 2116330193, now seen corresponding path program 11 times [2019-11-23 20:22:42,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:42,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703941122] [2019-11-23 20:22:42,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2019-11-23 20:22:42,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703941122] [2019-11-23 20:22:42,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628593157] [2019-11-23 20:22:42,764 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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