java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_20-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:20:05,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:20:05,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:20:05,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 06:20:05,757 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 06:20:05,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 06:20:05,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 06:20:05,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 06:20:05,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 06:20:05,775 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 06:20:05,776 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 06:20:05,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 06:20:05,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:20:05,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:20:05,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:20:05,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:20:05,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:20:05,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:20:05,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:20:05,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:20:05,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:20:05,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:20:05,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:20:05,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:20:05,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 06:20:05,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:20:05,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:20:05,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:20:05,803 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 [2019-09-08 06:20:05,820 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:20:05,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:20:05,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:20:05,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:20:05,823 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:20:05,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:20:05,824 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:20:05,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:20:05,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:20:05,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:20:05,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:20:05,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:20:05,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:20:05,827 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:20:05,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:20:05,827 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:20:05,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:20:05,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:20:05,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:20:05,828 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:20:05,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:20:05,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:20:05,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:20:05,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:20:05,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:20:05,830 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:20:05,830 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:20:05,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:20:05,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:20:05,885 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:20:05,899 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:20:05,905 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:20:05,906 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:20:05,907 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:20:05,908 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_20-2.c [2019-09-08 06:20:05,999 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f70462c22/a4f08dff99a54306a456f3bf3a086985/FLAGe703939b2 [2019-09-08 06:20:06,440 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:20:06,441 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_20-2.c [2019-09-08 06:20:06,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f70462c22/a4f08dff99a54306a456f3bf3a086985/FLAGe703939b2 [2019-09-08 06:20:06,847 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f70462c22/a4f08dff99a54306a456f3bf3a086985 [2019-09-08 06:20:06,859 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:20:06,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:20:06,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:20:06,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:20:06,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:20:06,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:20:06" (1/1) ... [2019-09-08 06:20:06,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c69540a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:20:06, skipping insertion in model container [2019-09-08 06:20:06,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:20:06" (1/1) ... [2019-09-08 06:20:06,877 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:20:06,891 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:20:07,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:20:07,050 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:20:07,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:20:07,077 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:20:07,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:20:07 WrapperNode [2019-09-08 06:20:07,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:20:07,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:20:07,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:20:07,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:20:07,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:20:07" (1/1) ... [2019-09-08 06:20:07,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:20:07" (1/1) ... [2019-09-08 06:20:07,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:20:07" (1/1) ... [2019-09-08 06:20:07,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:20:07" (1/1) ... [2019-09-08 06:20:07,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:20:07" (1/1) ... [2019-09-08 06:20:07,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:20:07" (1/1) ... [2019-09-08 06:20:07,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:20:07" (1/1) ... [2019-09-08 06:20:07,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:20:07,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:20:07,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:20:07,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:20:07,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:20:07" (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 [2019-09-08 06:20:07,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:20:07,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:20:07,250 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-09-08 06:20:07,250 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-09-08 06:20:07,252 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:20:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 06:20:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:20:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-09-08 06:20:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-09-08 06:20:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:20:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:20:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:20:07,467 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:20:07,467 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:20:07,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:20:07 BoogieIcfgContainer [2019-09-08 06:20:07,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:20:07,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:20:07,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:20:07,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:20:07,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:20:06" (1/3) ... [2019-09-08 06:20:07,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5b0200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:20:07, skipping insertion in model container [2019-09-08 06:20:07,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:20:07" (2/3) ... [2019-09-08 06:20:07,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5b0200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:20:07, skipping insertion in model container [2019-09-08 06:20:07,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:20:07" (3/3) ... [2019-09-08 06:20:07,502 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_20-2.c [2019-09-08 06:20:07,521 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:20:07,537 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:20:07,554 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:20:07,584 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:20:07,585 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:20:07,585 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:20:07,585 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:20:07,585 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:20:07,585 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:20:07,586 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:20:07,586 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:20:07,586 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:20:07,605 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-09-08 06:20:07,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 06:20:07,611 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:07,612 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:07,614 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:07,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:07,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2019-09-08 06:20:07,621 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:07,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:07,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:07,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:20:07,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:20:07,788 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:20:07,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:20:07,792 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:20:07,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:20:07,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:20:07,805 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2019-09-08 06:20:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:07,958 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-09-08 06:20:07,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:20:07,962 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-08 06:20:07,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:07,977 INFO L225 Difference]: With dead ends: 44 [2019-09-08 06:20:07,978 INFO L226 Difference]: Without dead ends: 30 [2019-09-08 06:20:07,985 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:20:08,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-08 06:20:08,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-08 06:20:08,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:20:08,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-09-08 06:20:08,052 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2019-09-08 06:20:08,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:08,053 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-09-08 06:20:08,053 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:20:08,053 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-09-08 06:20:08,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-08 06:20:08,059 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:08,059 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:08,060 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:08,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:08,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2019-09-08 06:20:08,063 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:08,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:08,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:08,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:20:08,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:20:08,127 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:20:08,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:20:08,129 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:20:08,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:20:08,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:20:08,130 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2019-09-08 06:20:08,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:08,204 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2019-09-08 06:20:08,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:20:08,205 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-09-08 06:20:08,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:08,206 INFO L225 Difference]: With dead ends: 36 [2019-09-08 06:20:08,207 INFO L226 Difference]: Without dead ends: 32 [2019-09-08 06:20:08,208 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:20:08,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-08 06:20:08,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-09-08 06:20:08,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:20:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-09-08 06:20:08,217 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2019-09-08 06:20:08,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:08,217 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-09-08 06:20:08,218 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:20:08,218 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-09-08 06:20:08,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-08 06:20:08,220 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:08,220 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:08,220 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:08,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:08,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2019-09-08 06:20:08,221 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:08,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:08,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:08,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:20:08,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:20:08,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:08,306 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:20:08,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:08,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:20:08,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:20:08,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:08,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2019-09-08 06:20:08,486 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-08 06:20:08,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-08 06:20:08,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:20:08,487 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2019-09-08 06:20:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:08,725 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2019-09-08 06:20:08,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 06:20:08,727 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-09-08 06:20:08,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:08,729 INFO L225 Difference]: With dead ends: 58 [2019-09-08 06:20:08,729 INFO L226 Difference]: Without dead ends: 34 [2019-09-08 06:20:08,731 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:20:08,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-08 06:20:08,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-09-08 06:20:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-08 06:20:08,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-09-08 06:20:08,752 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2019-09-08 06:20:08,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:08,753 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-09-08 06:20:08,753 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-08 06:20:08,753 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-09-08 06:20:08,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-08 06:20:08,758 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:08,758 INFO L399 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] [2019-09-08 06:20:08,759 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:08,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:08,760 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2019-09-08 06:20:08,760 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:08,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:08,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:08,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:20:08,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:20:08,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:08,905 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:08,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:20:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:08,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:20:08,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:20:08,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:08,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-09-08 06:20:08,986 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 06:20:08,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 06:20:08,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-08 06:20:08,989 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2019-09-08 06:20:09,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:09,111 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2019-09-08 06:20:09,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:20:09,112 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-09-08 06:20:09,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:09,115 INFO L225 Difference]: With dead ends: 43 [2019-09-08 06:20:09,115 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 06:20:09,116 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:20:09,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 06:20:09,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-09-08 06:20:09,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-08 06:20:09,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2019-09-08 06:20:09,125 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2019-09-08 06:20:09,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:09,126 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-09-08 06:20:09,126 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 06:20:09,126 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2019-09-08 06:20:09,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-08 06:20:09,128 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:09,128 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:09,128 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:09,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:09,129 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2019-09-08 06:20:09,129 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:09,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:09,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:09,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:20:09,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-08 06:20:09,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:09,199 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:09,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:20:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:09,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:20:09,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-08 06:20:09,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:09,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2019-09-08 06:20:09,308 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 06:20:09,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 06:20:09,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:20:09,309 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2019-09-08 06:20:09,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:09,545 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2019-09-08 06:20:09,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:20:09,545 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2019-09-08 06:20:09,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:09,547 INFO L225 Difference]: With dead ends: 70 [2019-09-08 06:20:09,547 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 06:20:09,549 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:20:09,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 06:20:09,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-08 06:20:09,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 06:20:09,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2019-09-08 06:20:09,560 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2019-09-08 06:20:09,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:09,560 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2019-09-08 06:20:09,560 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 06:20:09,560 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2019-09-08 06:20:09,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-08 06:20:09,563 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:09,564 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:09,564 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:09,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:09,565 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2019-09-08 06:20:09,565 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:09,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:09,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:09,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:20:09,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-08 06:20:09,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:09,751 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:20:09,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:09,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:20:09,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:20:09,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:09,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-09-08 06:20:09,909 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:20:09,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:20:09,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:20:09,911 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 14 states. [2019-09-08 06:20:10,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:10,499 INFO L93 Difference]: Finished difference Result 102 states and 162 transitions. [2019-09-08 06:20:10,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:20:10,500 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2019-09-08 06:20:10,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:10,502 INFO L225 Difference]: With dead ends: 102 [2019-09-08 06:20:10,503 INFO L226 Difference]: Without dead ends: 69 [2019-09-08 06:20:10,504 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2019-09-08 06:20:10,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-08 06:20:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2019-09-08 06:20:10,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:20:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 90 transitions. [2019-09-08 06:20:10,518 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 90 transitions. Word has length 40 [2019-09-08 06:20:10,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:10,519 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 90 transitions. [2019-09-08 06:20:10,519 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:20:10,519 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 90 transitions. [2019-09-08 06:20:10,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-08 06:20:10,522 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:10,522 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:10,523 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:10,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:10,523 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2019-09-08 06:20:10,523 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:10,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:10,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:10,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:20:10,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-09-08 06:20:10,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:10,603 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:20:10,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:10,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-08 06:20:10,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-09-08 06:20:10,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:10,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2019-09-08 06:20:10,706 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 06:20:10,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 06:20:10,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:20:10,706 INFO L87 Difference]: Start difference. First operand 60 states and 90 transitions. Second operand 12 states. [2019-09-08 06:20:10,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:10,950 INFO L93 Difference]: Finished difference Result 106 states and 197 transitions. [2019-09-08 06:20:10,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 06:20:10,950 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2019-09-08 06:20:10,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:10,953 INFO L225 Difference]: With dead ends: 106 [2019-09-08 06:20:10,953 INFO L226 Difference]: Without dead ends: 102 [2019-09-08 06:20:10,954 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:20:10,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-09-08 06:20:10,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2019-09-08 06:20:10,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-08 06:20:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 110 transitions. [2019-09-08 06:20:10,975 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 110 transitions. Word has length 54 [2019-09-08 06:20:10,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:10,976 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 110 transitions. [2019-09-08 06:20:10,976 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 06:20:10,976 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 110 transitions. [2019-09-08 06:20:10,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-08 06:20:10,986 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:10,986 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:10,986 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:10,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:10,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1229769625, now seen corresponding path program 1 times [2019-09-08 06:20:10,987 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:10,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:10,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:10,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:20:10,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 24 proven. 67 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-09-08 06:20:11,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:11,141 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:20:11,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:11,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 06:20:11,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 92 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-09-08 06:20:11,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:11,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2019-09-08 06:20:11,278 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 06:20:11,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 06:20:11,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-09-08 06:20:11,279 INFO L87 Difference]: Start difference. First operand 68 states and 110 transitions. Second operand 11 states. [2019-09-08 06:20:11,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:11,500 INFO L93 Difference]: Finished difference Result 108 states and 210 transitions. [2019-09-08 06:20:11,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:20:11,501 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 96 [2019-09-08 06:20:11,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:11,503 INFO L225 Difference]: With dead ends: 108 [2019-09-08 06:20:11,503 INFO L226 Difference]: Without dead ends: 104 [2019-09-08 06:20:11,505 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:20:11,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-08 06:20:11,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2019-09-08 06:20:11,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-08 06:20:11,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 125 transitions. [2019-09-08 06:20:11,525 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 125 transitions. Word has length 96 [2019-09-08 06:20:11,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:11,526 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 125 transitions. [2019-09-08 06:20:11,526 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 06:20:11,526 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 125 transitions. [2019-09-08 06:20:11,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-09-08 06:20:11,530 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:11,530 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 11, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:11,531 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:11,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:11,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1479059966, now seen corresponding path program 2 times [2019-09-08 06:20:11,531 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:11,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:11,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:11,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:20:11,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 67 proven. 259 refuted. 0 times theorem prover too weak. 923 trivial. 0 not checked. [2019-09-08 06:20:11,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:11,783 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:11,798 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:20:11,890 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:20:11,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:20:11,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-08 06:20:11,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 54 proven. 350 refuted. 0 times theorem prover too weak. 845 trivial. 0 not checked. [2019-09-08 06:20:12,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:12,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2019-09-08 06:20:12,065 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-08 06:20:12,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-08 06:20:12,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:20:12,066 INFO L87 Difference]: Start difference. First operand 72 states and 125 transitions. Second operand 16 states. [2019-09-08 06:20:12,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:12,456 INFO L93 Difference]: Finished difference Result 155 states and 406 transitions. [2019-09-08 06:20:12,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:20:12,457 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 216 [2019-09-08 06:20:12,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:12,461 INFO L225 Difference]: With dead ends: 155 [2019-09-08 06:20:12,462 INFO L226 Difference]: Without dead ends: 151 [2019-09-08 06:20:12,463 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2019-09-08 06:20:12,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-09-08 06:20:12,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 87. [2019-09-08 06:20:12,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-08 06:20:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 171 transitions. [2019-09-08 06:20:12,490 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 171 transitions. Word has length 216 [2019-09-08 06:20:12,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:12,491 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 171 transitions. [2019-09-08 06:20:12,491 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-08 06:20:12,491 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 171 transitions. [2019-09-08 06:20:12,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2019-09-08 06:20:12,497 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:12,498 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 24, 22, 22, 19, 13, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 11, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:12,498 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:12,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:12,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1387162373, now seen corresponding path program 3 times [2019-09-08 06:20:12,499 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:12,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:12,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:12,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:20:12,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3307 backedges. 178 proven. 467 refuted. 0 times theorem prover too weak. 2662 trivial. 0 not checked. [2019-09-08 06:20:12,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:12,774 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:12,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:20:12,847 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-09-08 06:20:12,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:20:12,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-08 06:20:12,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:13,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3307 backedges. 841 proven. 81 refuted. 0 times theorem prover too weak. 2385 trivial. 0 not checked. [2019-09-08 06:20:13,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:13,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2019-09-08 06:20:13,160 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-08 06:20:13,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-08 06:20:13,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2019-09-08 06:20:13,161 INFO L87 Difference]: Start difference. First operand 87 states and 171 transitions. Second operand 20 states. [2019-09-08 06:20:14,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:14,068 INFO L93 Difference]: Finished difference Result 230 states and 626 transitions. [2019-09-08 06:20:14,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-08 06:20:14,069 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 344 [2019-09-08 06:20:14,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:14,072 INFO L225 Difference]: With dead ends: 230 [2019-09-08 06:20:14,072 INFO L226 Difference]: Without dead ends: 143 [2019-09-08 06:20:14,075 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2019-09-08 06:20:14,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-09-08 06:20:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 129. [2019-09-08 06:20:14,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-09-08 06:20:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 251 transitions. [2019-09-08 06:20:14,097 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 251 transitions. Word has length 344 [2019-09-08 06:20:14,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:14,098 INFO L475 AbstractCegarLoop]: Abstraction has 129 states and 251 transitions. [2019-09-08 06:20:14,098 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-08 06:20:14,098 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 251 transitions. [2019-09-08 06:20:14,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 656 [2019-09-08 06:20:14,113 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:14,114 INFO L399 BasicCegarLoop]: trace histogram [52, 52, 43, 43, 42, 36, 26, 26, 26, 26, 26, 26, 26, 21, 21, 21, 21, 21, 21, 21, 21, 10, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:14,114 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:14,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:14,115 INFO L82 PathProgramCache]: Analyzing trace with hash 131247060, now seen corresponding path program 4 times [2019-09-08 06:20:14,115 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:14,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:14,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:14,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:20:14,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12547 backedges. 246 proven. 1436 refuted. 0 times theorem prover too weak. 10865 trivial. 0 not checked. [2019-09-08 06:20:14,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:14,531 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:14,546 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:20:14,686 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:20:14,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:20:14,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 1166 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-08 06:20:14,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12547 backedges. 3579 proven. 104 refuted. 0 times theorem prover too weak. 8864 trivial. 0 not checked. [2019-09-08 06:20:15,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:15,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2019-09-08 06:20:15,166 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 06:20:15,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 06:20:15,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:20:15,167 INFO L87 Difference]: Start difference. First operand 129 states and 251 transitions. Second operand 18 states. [2019-09-08 06:20:16,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:16,117 INFO L93 Difference]: Finished difference Result 333 states and 819 transitions. [2019-09-08 06:20:16,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-08 06:20:16,118 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 655 [2019-09-08 06:20:16,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:16,124 INFO L225 Difference]: With dead ends: 333 [2019-09-08 06:20:16,125 INFO L226 Difference]: Without dead ends: 209 [2019-09-08 06:20:16,128 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 655 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=1161, Unknown=0, NotChecked=0, Total=1406 [2019-09-08 06:20:16,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-09-08 06:20:16,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 180. [2019-09-08 06:20:16,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-09-08 06:20:16,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 320 transitions. [2019-09-08 06:20:16,163 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 320 transitions. Word has length 655 [2019-09-08 06:20:16,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:16,168 INFO L475 AbstractCegarLoop]: Abstraction has 180 states and 320 transitions. [2019-09-08 06:20:16,168 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 06:20:16,168 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 320 transitions. [2019-09-08 06:20:16,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 711 [2019-09-08 06:20:16,192 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:16,193 INFO L399 BasicCegarLoop]: trace histogram [56, 56, 47, 47, 45, 40, 28, 28, 28, 28, 28, 28, 28, 23, 23, 23, 23, 23, 23, 23, 22, 12, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:16,193 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:16,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:16,194 INFO L82 PathProgramCache]: Analyzing trace with hash 747696292, now seen corresponding path program 5 times [2019-09-08 06:20:16,194 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:16,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:16,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:16,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:20:16,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 14778 backedges. 244 proven. 1358 refuted. 0 times theorem prover too weak. 13176 trivial. 0 not checked. [2019-09-08 06:20:16,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:16,777 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:16,790 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:20:16,857 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-09-08 06:20:16,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:20:16,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:20:16,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 14778 backedges. 3090 proven. 4 refuted. 0 times theorem prover too weak. 11684 trivial. 0 not checked. [2019-09-08 06:20:17,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:17,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2019-09-08 06:20:17,156 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:20:17,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:20:17,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:20:17,157 INFO L87 Difference]: Start difference. First operand 180 states and 320 transitions. Second operand 14 states. [2019-09-08 06:20:17,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:17,628 INFO L93 Difference]: Finished difference Result 431 states and 961 transitions. [2019-09-08 06:20:17,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-08 06:20:17,629 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 710 [2019-09-08 06:20:17,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:17,635 INFO L225 Difference]: With dead ends: 431 [2019-09-08 06:20:17,635 INFO L226 Difference]: Without dead ends: 260 [2019-09-08 06:20:17,638 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 712 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2019-09-08 06:20:17,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-09-08 06:20:17,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 232. [2019-09-08 06:20:17,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-09-08 06:20:17,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 460 transitions. [2019-09-08 06:20:17,672 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 460 transitions. Word has length 710 [2019-09-08 06:20:17,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:17,672 INFO L475 AbstractCegarLoop]: Abstraction has 232 states and 460 transitions. [2019-09-08 06:20:17,672 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:20:17,673 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 460 transitions. [2019-09-08 06:20:17,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1508 [2019-09-08 06:20:17,694 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:17,695 INFO L399 BasicCegarLoop]: trace histogram [120, 120, 101, 101, 89, 85, 60, 60, 60, 60, 60, 60, 60, 50, 50, 50, 50, 50, 50, 50, 39, 31, 25, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:17,695 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:17,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:17,696 INFO L82 PathProgramCache]: Analyzing trace with hash 668997839, now seen corresponding path program 6 times [2019-09-08 06:20:17,696 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:17,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:17,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:17,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:20:17,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 68226 backedges. 551 proven. 4180 refuted. 0 times theorem prover too weak. 63495 trivial. 0 not checked. [2019-09-08 06:20:19,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:19,109 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:20:19,124 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:19,292 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-09-08 06:20:19,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:20:19,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:20:19,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 68226 backedges. 17283 proven. 6 refuted. 0 times theorem prover too weak. 50937 trivial. 0 not checked. [2019-09-08 06:20:20,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:20,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2019-09-08 06:20:20,880 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 06:20:20,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 06:20:20,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:20:20,881 INFO L87 Difference]: Start difference. First operand 232 states and 460 transitions. Second operand 19 states. [2019-09-08 06:20:21,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:21,863 INFO L93 Difference]: Finished difference Result 488 states and 1133 transitions. [2019-09-08 06:20:21,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 06:20:21,863 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1507 [2019-09-08 06:20:21,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:21,868 INFO L225 Difference]: With dead ends: 488 [2019-09-08 06:20:21,868 INFO L226 Difference]: Without dead ends: 265 [2019-09-08 06:20:21,872 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1549 GetRequests, 1508 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2019-09-08 06:20:21,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-09-08 06:20:21,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 225. [2019-09-08 06:20:21,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-09-08 06:20:21,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 371 transitions. [2019-09-08 06:20:21,904 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 371 transitions. Word has length 1507 [2019-09-08 06:20:21,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:21,905 INFO L475 AbstractCegarLoop]: Abstraction has 225 states and 371 transitions. [2019-09-08 06:20:21,905 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 06:20:21,905 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 371 transitions. [2019-09-08 06:20:21,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2019-09-08 06:20:21,911 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:21,911 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 37, 37, 37, 33, 24, 24, 24, 24, 24, 24, 24, 19, 18, 18, 18, 18, 18, 18, 18, 11, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:21,911 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:21,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:21,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1417893135, now seen corresponding path program 7 times [2019-09-08 06:20:21,912 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:21,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:21,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:21,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:20:21,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:21,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10086 backedges. 359 proven. 948 refuted. 0 times theorem prover too weak. 8779 trivial. 0 not checked. [2019-09-08 06:20:22,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:22,401 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:22,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:20:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:22,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 1304 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-08 06:20:22,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10086 backedges. 258 proven. 1634 refuted. 0 times theorem prover too weak. 8194 trivial. 0 not checked. [2019-09-08 06:20:22,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:22,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 19 [2019-09-08 06:20:22,833 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 06:20:22,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 06:20:22,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:20:22,834 INFO L87 Difference]: Start difference. First operand 225 states and 371 transitions. Second operand 19 states. [2019-09-08 06:20:23,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:23,266 INFO L93 Difference]: Finished difference Result 301 states and 628 transitions. [2019-09-08 06:20:23,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-08 06:20:23,266 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 587 [2019-09-08 06:20:23,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:23,278 INFO L225 Difference]: With dead ends: 301 [2019-09-08 06:20:23,278 INFO L226 Difference]: Without dead ends: 297 [2019-09-08 06:20:23,279 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2019-09-08 06:20:23,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2019-09-08 06:20:23,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 281. [2019-09-08 06:20:23,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2019-09-08 06:20:23,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 563 transitions. [2019-09-08 06:20:23,316 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 563 transitions. Word has length 587 [2019-09-08 06:20:23,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:23,320 INFO L475 AbstractCegarLoop]: Abstraction has 281 states and 563 transitions. [2019-09-08 06:20:23,320 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 06:20:23,320 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 563 transitions. [2019-09-08 06:20:23,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1184 [2019-09-08 06:20:23,335 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:23,336 INFO L399 BasicCegarLoop]: trace histogram [88, 88, 85, 85, 72, 66, 44, 44, 44, 44, 44, 44, 44, 42, 42, 42, 42, 42, 42, 42, 28, 24, 22, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:23,336 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:23,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:23,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1474592831, now seen corresponding path program 8 times [2019-09-08 06:20:23,337 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:23,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:23,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:23,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:20:23,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 41521 backedges. 879 proven. 2315 refuted. 0 times theorem prover too weak. 38327 trivial. 0 not checked. [2019-09-08 06:20:24,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:24,279 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:24,290 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:20:24,638 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:20:24,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:20:24,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-08 06:20:24,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 41521 backedges. 623 proven. 3938 refuted. 0 times theorem prover too weak. 36960 trivial. 0 not checked. [2019-09-08 06:20:25,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:25,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 21 [2019-09-08 06:20:25,339 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-08 06:20:25,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-08 06:20:25,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2019-09-08 06:20:25,341 INFO L87 Difference]: Start difference. First operand 281 states and 563 transitions. Second operand 21 states. [2019-09-08 06:20:25,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:25,815 INFO L93 Difference]: Finished difference Result 339 states and 827 transitions. [2019-09-08 06:20:25,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-08 06:20:25,816 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1183 [2019-09-08 06:20:25,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:25,826 INFO L225 Difference]: With dead ends: 339 [2019-09-08 06:20:25,827 INFO L226 Difference]: Without dead ends: 335 [2019-09-08 06:20:25,828 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1215 GetRequests, 1180 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=271, Invalid=1061, Unknown=0, NotChecked=0, Total=1332 [2019-09-08 06:20:25,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2019-09-08 06:20:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 253. [2019-09-08 06:20:25,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2019-09-08 06:20:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 456 transitions. [2019-09-08 06:20:25,861 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 456 transitions. Word has length 1183 [2019-09-08 06:20:25,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:25,863 INFO L475 AbstractCegarLoop]: Abstraction has 253 states and 456 transitions. [2019-09-08 06:20:25,863 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-08 06:20:25,863 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 456 transitions. [2019-09-08 06:20:25,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3010 [2019-09-08 06:20:25,938 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:25,940 INFO L399 BasicCegarLoop]: trace histogram [242, 242, 199, 199, 185, 171, 121, 121, 121, 121, 121, 121, 121, 99, 99, 99, 99, 99, 99, 99, 86, 57, 50, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:25,940 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:25,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:25,942 INFO L82 PathProgramCache]: Analyzing trace with hash 431449143, now seen corresponding path program 9 times [2019-09-08 06:20:25,942 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:25,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:25,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:25,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:20:25,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 275447 backedges. 2007 proven. 7656 refuted. 0 times theorem prover too weak. 265784 trivial. 0 not checked. [2019-09-08 06:20:30,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:30,202 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:30,213 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:20:30,412 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-08 06:20:30,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:20:30,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-08 06:20:30,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 275447 backedges. 9643 proven. 99 refuted. 0 times theorem prover too weak. 265705 trivial. 0 not checked. [2019-09-08 06:20:33,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:33,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2019-09-08 06:20:33,431 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-08 06:20:33,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-08 06:20:33,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-09-08 06:20:33,432 INFO L87 Difference]: Start difference. First operand 253 states and 456 transitions. Second operand 20 states. [2019-09-08 06:20:34,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:34,599 INFO L93 Difference]: Finished difference Result 666 states and 1585 transitions. [2019-09-08 06:20:34,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-08 06:20:34,599 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 3009 [2019-09-08 06:20:34,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:34,615 INFO L225 Difference]: With dead ends: 666 [2019-09-08 06:20:34,615 INFO L226 Difference]: Without dead ends: 423 [2019-09-08 06:20:34,621 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3052 GetRequests, 3009 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=336, Invalid=1644, Unknown=0, NotChecked=0, Total=1980 [2019-09-08 06:20:34,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2019-09-08 06:20:34,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 355. [2019-09-08 06:20:34,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-09-08 06:20:34,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 742 transitions. [2019-09-08 06:20:34,672 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 742 transitions. Word has length 3009 [2019-09-08 06:20:34,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:34,674 INFO L475 AbstractCegarLoop]: Abstraction has 355 states and 742 transitions. [2019-09-08 06:20:34,674 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-08 06:20:34,674 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 742 transitions. [2019-09-08 06:20:34,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2127 [2019-09-08 06:20:34,731 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:34,732 INFO L399 BasicCegarLoop]: trace histogram [158, 158, 153, 153, 129, 124, 79, 79, 79, 79, 79, 79, 79, 76, 76, 76, 76, 76, 76, 76, 50, 48, 34, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:34,733 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:34,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:34,733 INFO L82 PathProgramCache]: Analyzing trace with hash 7163802, now seen corresponding path program 10 times [2019-09-08 06:20:34,734 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:34,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:34,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:34,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:20:34,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 135730 backedges. 1854 proven. 5756 refuted. 0 times theorem prover too weak. 128120 trivial. 0 not checked. [2019-09-08 06:20:37,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:37,854 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:37,866 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:20:38,366 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:20:38,366 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:20:38,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 3784 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-08 06:20:38,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 135730 backedges. 19526 proven. 153 refuted. 0 times theorem prover too weak. 116051 trivial. 0 not checked. [2019-09-08 06:20:40,059 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:40,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2019-09-08 06:20:40,062 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-08 06:20:40,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-08 06:20:40,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2019-09-08 06:20:40,063 INFO L87 Difference]: Start difference. First operand 355 states and 742 transitions. Second operand 21 states. [2019-09-08 06:20:40,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:40,885 INFO L93 Difference]: Finished difference Result 700 states and 1716 transitions. [2019-09-08 06:20:40,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-08 06:20:40,885 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 2126 [2019-09-08 06:20:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:40,893 INFO L225 Difference]: With dead ends: 700 [2019-09-08 06:20:40,894 INFO L226 Difference]: Without dead ends: 348 [2019-09-08 06:20:40,900 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2158 GetRequests, 2121 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2019-09-08 06:20:40,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2019-09-08 06:20:40,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 342. [2019-09-08 06:20:40,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2019-09-08 06:20:40,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 646 transitions. [2019-09-08 06:20:40,928 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 646 transitions. Word has length 2126 [2019-09-08 06:20:40,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:40,929 INFO L475 AbstractCegarLoop]: Abstraction has 342 states and 646 transitions. [2019-09-08 06:20:40,929 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-08 06:20:40,929 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 646 transitions. [2019-09-08 06:20:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4851 [2019-09-08 06:20:41,107 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:41,108 INFO L399 BasicCegarLoop]: trace histogram [382, 382, 329, 329, 294, 283, 191, 191, 191, 191, 191, 191, 191, 164, 164, 164, 164, 164, 164, 164, 130, 92, 88, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:41,109 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:41,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:41,110 INFO L82 PathProgramCache]: Analyzing trace with hash -888588370, now seen corresponding path program 11 times [2019-09-08 06:20:41,110 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:41,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:41,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:41,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:20:41,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 715926 backedges. 2119 proven. 19467 refuted. 0 times theorem prover too weak. 694340 trivial. 0 not checked. [2019-09-08 06:20:51,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:51,163 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:51,209 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:20:51,519 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-08 06:20:51,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:20:51,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-08 06:20:51,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 715926 backedges. 150869 proven. 129 refuted. 0 times theorem prover too weak. 564928 trivial. 0 not checked. [2019-09-08 06:20:58,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:58,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2019-09-08 06:20:58,701 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-08 06:20:58,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-08 06:20:58,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2019-09-08 06:20:58,702 INFO L87 Difference]: Start difference. First operand 342 states and 646 transitions. Second operand 25 states. [2019-09-08 06:21:00,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:21:00,641 INFO L93 Difference]: Finished difference Result 845 states and 2085 transitions. [2019-09-08 06:21:00,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-09-08 06:21:00,641 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 4850 [2019-09-08 06:21:00,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:21:00,651 INFO L225 Difference]: With dead ends: 845 [2019-09-08 06:21:00,651 INFO L226 Difference]: Without dead ends: 500 [2019-09-08 06:21:00,659 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4914 GetRequests, 4851 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=3480, Unknown=0, NotChecked=0, Total=4160 [2019-09-08 06:21:00,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2019-09-08 06:21:00,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 384. [2019-09-08 06:21:00,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2019-09-08 06:21:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 720 transitions. [2019-09-08 06:21:00,693 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 720 transitions. Word has length 4850 [2019-09-08 06:21:00,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:21:00,695 INFO L475 AbstractCegarLoop]: Abstraction has 384 states and 720 transitions. [2019-09-08 06:21:00,695 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-08 06:21:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 720 transitions. [2019-09-08 06:21:00,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2602 [2019-09-08 06:21:00,746 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:21:00,747 INFO L399 BasicCegarLoop]: trace histogram [194, 194, 187, 187, 155, 153, 97, 97, 97, 97, 97, 97, 97, 93, 93, 93, 93, 93, 93, 93, 62, 56, 39, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:21:00,748 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:21:00,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:21:00,749 INFO L82 PathProgramCache]: Analyzing trace with hash -108583471, now seen corresponding path program 12 times [2019-09-08 06:21:00,749 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:21:00,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:21:00,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:00,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:21:00,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:21:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 203747 backedges. 6456 proven. 2878 refuted. 0 times theorem prover too weak. 194413 trivial. 0 not checked. [2019-09-08 06:21:04,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:21:04,202 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:21:04,214 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:21:04,563 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2019-09-08 06:21:04,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:21:04,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-08 06:21:04,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:21:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 203747 backedges. 2110 proven. 8295 refuted. 0 times theorem prover too weak. 193342 trivial. 0 not checked. [2019-09-08 06:21:07,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:21:07,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2019-09-08 06:21:07,218 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-08 06:21:07,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-08 06:21:07,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2019-09-08 06:21:07,218 INFO L87 Difference]: Start difference. First operand 384 states and 720 transitions. Second operand 21 states. [2019-09-08 06:21:07,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:21:07,881 INFO L93 Difference]: Finished difference Result 429 states and 882 transitions. [2019-09-08 06:21:07,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-08 06:21:07,882 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 2601 [2019-09-08 06:21:07,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:21:07,893 INFO L225 Difference]: With dead ends: 429 [2019-09-08 06:21:07,893 INFO L226 Difference]: Without dead ends: 425 [2019-09-08 06:21:07,894 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2637 GetRequests, 2602 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=1061, Unknown=0, NotChecked=0, Total=1332 [2019-09-08 06:21:07,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-09-08 06:21:07,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 408. [2019-09-08 06:21:07,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2019-09-08 06:21:07,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 831 transitions. [2019-09-08 06:21:07,931 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 831 transitions. Word has length 2601 [2019-09-08 06:21:07,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:21:07,932 INFO L475 AbstractCegarLoop]: Abstraction has 408 states and 831 transitions. [2019-09-08 06:21:07,932 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-08 06:21:07,932 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 831 transitions. [2019-09-08 06:21:08,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4835 [2019-09-08 06:21:08,177 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:21:08,179 INFO L399 BasicCegarLoop]: trace histogram [359, 359, 350, 350, 287, 286, 179, 179, 179, 179, 179, 179, 179, 175, 175, 175, 175, 175, 175, 175, 111, 108, 73, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:21:08,179 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:21:08,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:21:08,181 INFO L82 PathProgramCache]: Analyzing trace with hash -698392491, now seen corresponding path program 13 times [2019-09-08 06:21:08,181 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:21:08,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:21:08,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:08,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:21:08,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:21:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 707764 backedges. 16026 proven. 12827 refuted. 0 times theorem prover too weak. 678911 trivial. 0 not checked. [2019-09-08 06:21:17,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:21:17,982 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:21:17,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:21:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:21:19,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 10734 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-08 06:21:19,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:21:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 707764 backedges. 2935 proven. 22658 refuted. 0 times theorem prover too weak. 682171 trivial. 0 not checked. [2019-09-08 06:21:26,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:21:26,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 36 [2019-09-08 06:21:26,734 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-08 06:21:26,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-08 06:21:26,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 06:21:26,735 INFO L87 Difference]: Start difference. First operand 408 states and 831 transitions. Second operand 36 states. [2019-09-08 06:21:31,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:21:31,217 INFO L93 Difference]: Finished difference Result 1140 states and 3370 transitions. [2019-09-08 06:21:31,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2019-09-08 06:21:31,218 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 4834 [2019-09-08 06:21:31,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:21:31,234 INFO L225 Difference]: With dead ends: 1140 [2019-09-08 06:21:31,235 INFO L226 Difference]: Without dead ends: 727 [2019-09-08 06:21:31,248 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4952 GetRequests, 4832 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4968 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1618, Invalid=13144, Unknown=0, NotChecked=0, Total=14762 [2019-09-08 06:21:31,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2019-09-08 06:21:31,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 593. [2019-09-08 06:21:31,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 593 states. [2019-09-08 06:21:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1260 transitions. [2019-09-08 06:21:31,308 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1260 transitions. Word has length 4834 [2019-09-08 06:21:31,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:21:31,309 INFO L475 AbstractCegarLoop]: Abstraction has 593 states and 1260 transitions. [2019-09-08 06:21:31,310 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-08 06:21:31,310 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1260 transitions. [2019-09-08 06:21:31,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10009 [2019-09-08 06:21:31,827 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:21:31,831 INFO L399 BasicCegarLoop]: trace histogram [752, 752, 717, 717, 598, 589, 376, 376, 376, 376, 376, 376, 376, 358, 358, 358, 358, 358, 358, 358, 240, 213, 154, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:21:31,831 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:21:31,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:21:31,833 INFO L82 PathProgramCache]: Analyzing trace with hash 46635903, now seen corresponding path program 14 times [2019-09-08 06:21:31,833 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:21:31,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:21:31,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:31,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:21:31,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:22:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3045529 backedges. 6923 proven. 54274 refuted. 0 times theorem prover too weak. 2984332 trivial. 0 not checked. [2019-09-08 06:22:07,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:22:07,939 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:22:07,950 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:22:10,861 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:22:10,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:22:10,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 22222 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-08 06:22:11,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:22:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3045529 backedges. 6422 proven. 51316 refuted. 0 times theorem prover too weak. 2987791 trivial. 0 not checked. [2019-09-08 06:22:40,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:22:40,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 29 [2019-09-08 06:22:40,729 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-08 06:22:40,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-08 06:22:40,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2019-09-08 06:22:40,730 INFO L87 Difference]: Start difference. First operand 593 states and 1260 transitions. Second operand 29 states. [2019-09-08 06:22:42,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:22:42,979 INFO L93 Difference]: Finished difference Result 1507 states and 4137 transitions. [2019-09-08 06:22:42,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-09-08 06:22:42,980 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 10008 [2019-09-08 06:22:42,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:22:43,000 INFO L225 Difference]: With dead ends: 1507 [2019-09-08 06:22:43,000 INFO L226 Difference]: Without dead ends: 932 [2019-09-08 06:22:43,011 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10080 GetRequests, 10005 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=879, Invalid=4973, Unknown=0, NotChecked=0, Total=5852 [2019-09-08 06:22:43,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2019-09-08 06:22:43,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 832. [2019-09-08 06:22:43,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2019-09-08 06:22:43,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1924 transitions. [2019-09-08 06:22:43,091 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1924 transitions. Word has length 10008 [2019-09-08 06:22:43,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:22:43,093 INFO L475 AbstractCegarLoop]: Abstraction has 832 states and 1924 transitions. [2019-09-08 06:22:43,093 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-08 06:22:43,093 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1924 transitions. [2019-09-08 06:22:43,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11601 [2019-09-08 06:22:43,839 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:22:43,843 INFO L399 BasicCegarLoop]: trace histogram [853, 853, 850, 850, 688, 687, 426, 426, 426, 426, 426, 426, 426, 425, 425, 425, 425, 425, 425, 425, 263, 261, 165, 163, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:22:43,843 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:22:43,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:22:43,845 INFO L82 PathProgramCache]: Analyzing trace with hash -357786528, now seen corresponding path program 15 times [2019-09-08 06:22:43,846 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:22:43,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:22:43,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:22:43,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:22:43,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:22:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:23:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4091281 backedges. 7267 proven. 56888 refuted. 0 times theorem prover too weak. 4027126 trivial. 0 not checked. [2019-09-08 06:23:34,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:23:34,988 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:23:35,008 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:23:35,660 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-09-08 06:23:35,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:23:35,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-08 06:23:35,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:24:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4091281 backedges. 42353 proven. 146 refuted. 0 times theorem prover too weak. 4048782 trivial. 0 not checked. [2019-09-08 06:24:16,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:24:16,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 23 [2019-09-08 06:24:16,017 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-08 06:24:16,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-08 06:24:16,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2019-09-08 06:24:16,018 INFO L87 Difference]: Start difference. First operand 832 states and 1924 transitions. Second operand 23 states. [2019-09-08 06:24:16,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:24:16,940 INFO L93 Difference]: Finished difference Result 1601 states and 3989 transitions. [2019-09-08 06:24:16,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-08 06:24:16,945 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 11600 [2019-09-08 06:24:16,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:24:16,956 INFO L225 Difference]: With dead ends: 1601 [2019-09-08 06:24:16,956 INFO L226 Difference]: Without dead ends: 786 [2019-09-08 06:24:16,965 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11639 GetRequests, 11599 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=260, Invalid=1462, Unknown=0, NotChecked=0, Total=1722 [2019-09-08 06:24:16,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2019-09-08 06:24:17,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 715. [2019-09-08 06:24:17,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 715 states. [2019-09-08 06:24:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1440 transitions. [2019-09-08 06:24:17,025 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1440 transitions. Word has length 11600 [2019-09-08 06:24:17,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:24:17,027 INFO L475 AbstractCegarLoop]: Abstraction has 715 states and 1440 transitions. [2019-09-08 06:24:17,027 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-08 06:24:17,027 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1440 transitions. [2019-09-08 06:24:18,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13932 [2019-09-08 06:24:18,056 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:24:18,061 INFO L399 BasicCegarLoop]: trace histogram [1031, 1031, 1014, 1014, 830, 824, 515, 515, 515, 515, 515, 515, 515, 507, 507, 507, 507, 507, 507, 507, 323, 309, 201, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:24:18,061 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:24:18,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:24:18,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1649786737, now seen corresponding path program 16 times [2019-09-08 06:24:18,064 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:24:18,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:24:18,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:24:18,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:24:18,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:24:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5903839 backedges. 53802 proven. 59636 refuted. 0 times theorem prover too weak. 5790401 trivial. 0 not checked. [2019-09-08 06:25:44,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:44,443 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:25:44,455 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:25:47,697 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:25:47,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:25:47,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 24793 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-08 06:25:47,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:26:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5903839 backedges. 745026 proven. 3623 refuted. 0 times theorem prover too weak. 5155190 trivial. 0 not checked. [2019-09-08 06:26:46,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:26:46,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23] total 39 [2019-09-08 06:26:46,929 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-08 06:26:46,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-08 06:26:46,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2019-09-08 06:26:46,931 INFO L87 Difference]: Start difference. First operand 715 states and 1440 transitions. Second operand 39 states. [2019-09-08 06:26:52,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:52,050 INFO L93 Difference]: Finished difference Result 2054 states and 5207 transitions. [2019-09-08 06:26:52,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2019-09-08 06:26:52,050 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 13931 [2019-09-08 06:26:52,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:52,069 INFO L225 Difference]: With dead ends: 2054 [2019-09-08 06:26:52,070 INFO L226 Difference]: Without dead ends: 1213 [2019-09-08 06:26:52,085 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 14067 GetRequests, 13936 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6018 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1799, Invalid=15757, Unknown=0, NotChecked=0, Total=17556 [2019-09-08 06:26:52,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2019-09-08 06:26:52,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 914. [2019-09-08 06:26:52,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 914 states. [2019-09-08 06:26:52,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1783 transitions. [2019-09-08 06:26:52,191 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1783 transitions. Word has length 13931 [2019-09-08 06:26:52,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:52,193 INFO L475 AbstractCegarLoop]: Abstraction has 914 states and 1783 transitions. [2019-09-08 06:26:52,194 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-08 06:26:52,194 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1783 transitions. [2019-09-08 06:26:59,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39096 [2019-09-08 06:26:59,764 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:59,770 INFO L399 BasicCegarLoop]: trace histogram [2883, 2883, 2858, 2858, 2323, 2319, 1441, 1441, 1441, 1441, 1441, 1441, 1441, 1429, 1429, 1429, 1429, 1429, 1429, 1429, 894, 878, 560, 539, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:26:59,771 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:59,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:59,774 INFO L82 PathProgramCache]: Analyzing trace with hash -715263993, now seen corresponding path program 17 times [2019-09-08 06:26:59,774 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:59,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:59,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:59,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:26:59,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat