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/array-examples/standard_copyInitSum2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 09:47:47,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 09:47:47,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 09:47:47,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 09:47:47,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 09:47:47,818 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 09:47:47,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 09:47:47,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 09:47:47,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 09:47:47,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 09:47:47,825 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 09:47:47,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 09:47:47,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 09:47:47,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 09:47:47,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 09:47:47,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 09:47:47,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 09:47:47,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 09:47:47,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 09:47:47,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 09:47:47,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 09:47:47,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 09:47:47,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 09:47:47,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 09:47:47,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-07 09:47:47,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-07 09:47:47,841 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-07 09:47:47,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-07 09:47:47,842 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-07 09:47:47,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-07 09:47:47,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-07 09:47:47,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-07 09:47:47,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-07 09:47:47,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-07 09:47:47,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-07 09:47:47,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-07 09:47:47,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-07 09:47:47,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-07 09:47:47,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 09:47:47,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 09:47:47,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 09:47:47,850 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 [2019-09-07 09:47:47,864 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 09:47:47,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 09:47:47,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 09:47:47,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 09:47:47,866 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 09:47:47,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 09:47:47,867 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 09:47:47,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 09:47:47,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 09:47:47,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 09:47:47,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 09:47:47,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 09:47:47,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 09:47:47,868 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 09:47:47,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 09:47:47,869 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 09:47:47,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 09:47:47,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 09:47:47,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 09:47:47,869 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 09:47:47,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 09:47:47,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 09:47:47,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 09:47:47,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 09:47:47,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 09:47:47,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 09:47:47,871 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 09:47:47,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 09:47:47,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 09:47:47,910 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 09:47:47,922 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 09:47:47,926 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 09:47:47,928 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 09:47:47,928 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 09:47:47,929 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-1.i [2019-09-07 09:47:48,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15ac86029/3995676ba08843398c8c8fb9fdef1d37/FLAG369dce4bc [2019-09-07 09:47:48,460 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 09:47:48,460 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-1.i [2019-09-07 09:47:48,467 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15ac86029/3995676ba08843398c8c8fb9fdef1d37/FLAG369dce4bc [2019-09-07 09:47:48,846 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15ac86029/3995676ba08843398c8c8fb9fdef1d37 [2019-09-07 09:47:48,857 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 09:47:48,859 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 09:47:48,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 09:47:48,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 09:47:48,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 09:47:48,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:47:48" (1/1) ... [2019-09-07 09:47:48,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9a71346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:47:48, skipping insertion in model container [2019-09-07 09:47:48,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:47:48" (1/1) ... [2019-09-07 09:47:48,877 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 09:47:48,894 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 09:47:49,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:47:49,065 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 09:47:49,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:47:49,113 INFO L192 MainTranslator]: Completed translation [2019-09-07 09:47:49,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:47:49 WrapperNode [2019-09-07 09:47:49,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 09:47:49,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 09:47:49,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 09:47:49,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 09:47:49,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:47:49" (1/1) ... [2019-09-07 09:47:49,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:47:49" (1/1) ... [2019-09-07 09:47:49,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:47:49" (1/1) ... [2019-09-07 09:47:49,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:47:49" (1/1) ... [2019-09-07 09:47:49,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:47:49" (1/1) ... [2019-09-07 09:47:49,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:47:49" (1/1) ... [2019-09-07 09:47:49,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:47:49" (1/1) ... [2019-09-07 09:47:49,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 09:47:49,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 09:47:49,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 09:47:49,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 09:47:49,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:47:49" (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 [2019-09-07 09:47:49,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 09:47:49,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 09:47:49,339 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 09:47:49,339 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 09:47:49,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 09:47:49,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 09:47:49,339 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 09:47:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 09:47:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 09:47:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 09:47:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 09:47:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 09:47:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 09:47:49,610 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 09:47:49,611 INFO L283 CfgBuilder]: Removed 4 assume(true) statements. [2019-09-07 09:47:49,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:47:49 BoogieIcfgContainer [2019-09-07 09:47:49,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 09:47:49,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 09:47:49,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 09:47:49,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 09:47:49,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 09:47:48" (1/3) ... [2019-09-07 09:47:49,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@767e4528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:47:49, skipping insertion in model container [2019-09-07 09:47:49,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:47:49" (2/3) ... [2019-09-07 09:47:49,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@767e4528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:47:49, skipping insertion in model container [2019-09-07 09:47:49,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:47:49" (3/3) ... [2019-09-07 09:47:49,640 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-1.i [2019-09-07 09:47:49,652 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 09:47:49,661 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 09:47:49,705 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 09:47:49,734 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 09:47:49,735 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 09:47:49,735 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 09:47:49,736 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 09:47:49,736 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 09:47:49,736 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 09:47:49,736 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 09:47:49,736 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 09:47:49,736 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 09:47:49,753 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-09-07 09:47:49,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-07 09:47:49,758 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:49,759 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:47:49,764 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:49,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:49,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1001985310, now seen corresponding path program 1 times [2019-09-07 09:47:49,771 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:49,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:49,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:49,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:47:49,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:47:49,919 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:47:49,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 09:47:49,922 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 09:47:49,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 09:47:49,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:47:49,936 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-09-07 09:47:49,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:47:49,963 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2019-09-07 09:47:49,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 09:47:49,965 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-09-07 09:47:49,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:47:49,974 INFO L225 Difference]: With dead ends: 51 [2019-09-07 09:47:49,975 INFO L226 Difference]: Without dead ends: 24 [2019-09-07 09:47:49,979 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:47:49,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-07 09:47:50,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-07 09:47:50,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-07 09:47:50,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-09-07 09:47:50,025 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2019-09-07 09:47:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:47:50,026 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-09-07 09:47:50,026 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 09:47:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-09-07 09:47:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-07 09:47:50,027 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:50,027 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:47:50,028 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:50,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:50,028 INFO L82 PathProgramCache]: Analyzing trace with hash -400143846, now seen corresponding path program 1 times [2019-09-07 09:47:50,029 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:50,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:50,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:50,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:47:50,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:47:50,091 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:47:50,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:47:50,095 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:47:50,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:47:50,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:47:50,096 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 3 states. [2019-09-07 09:47:50,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:47:50,219 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-09-07 09:47:50,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:47:50,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-09-07 09:47:50,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:47:50,223 INFO L225 Difference]: With dead ends: 46 [2019-09-07 09:47:50,223 INFO L226 Difference]: Without dead ends: 29 [2019-09-07 09:47:50,225 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:47:50,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-07 09:47:50,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-09-07 09:47:50,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-07 09:47:50,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-09-07 09:47:50,238 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2019-09-07 09:47:50,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:47:50,239 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-09-07 09:47:50,239 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:47:50,239 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-09-07 09:47:50,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-07 09:47:50,241 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:50,241 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:47:50,242 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:50,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:50,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1150570790, now seen corresponding path program 1 times [2019-09-07 09:47:50,243 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:50,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:50,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:50,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:47:50,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:50,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-07 09:47:50,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:47:50,384 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) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:47:50,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:47:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:50,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:47:50,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:47:50,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Stream Closed [2019-09-07 09:47:50,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:47:50,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:47:50,483 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:47:50,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:47:50,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:47:50,488 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2019-09-07 09:47:50,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:47:50,573 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2019-09-07 09:47:50,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:47:50,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-09-07 09:47:50,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:47:50,574 INFO L225 Difference]: With dead ends: 53 [2019-09-07 09:47:50,575 INFO L226 Difference]: Without dead ends: 34 [2019-09-07 09:47:50,575 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:47:50,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-07 09:47:50,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-09-07 09:47:50,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-07 09:47:50,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-09-07 09:47:50,583 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2019-09-07 09:47:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:47:50,583 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-09-07 09:47:50,583 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:47:50,583 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-09-07 09:47:50,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-07 09:47:50,584 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:50,585 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:47:50,585 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:50,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:50,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1868122094, now seen corresponding path program 2 times [2019-09-07 09:47:50,585 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:50,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:50,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:50,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:47:50,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-07 09:47:50,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:47:50,668 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 [2019-09-07 09:47:50,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:47:50,733 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:47:50,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:47:50,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 09:47:50,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:47:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-07 09:47:50,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:47:50,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-07 09:47:50,769 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 09:47:50,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 09:47:50,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 09:47:50,770 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 6 states. [2019-09-07 09:47:50,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:47:50,867 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2019-09-07 09:47:50,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 09:47:50,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-09-07 09:47:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:47:50,870 INFO L225 Difference]: With dead ends: 62 [2019-09-07 09:47:50,870 INFO L226 Difference]: Without dead ends: 39 [2019-09-07 09:47:50,870 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 09:47:50,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-07 09:47:50,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-09-07 09:47:50,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-07 09:47:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2019-09-07 09:47:50,878 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 27 [2019-09-07 09:47:50,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:47:50,878 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2019-09-07 09:47:50,878 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 09:47:50,879 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2019-09-07 09:47:50,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 09:47:50,880 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:50,880 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:47:50,880 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:50,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:50,881 INFO L82 PathProgramCache]: Analyzing trace with hash 150752210, now seen corresponding path program 3 times [2019-09-07 09:47:50,881 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:50,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:50,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:50,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:47:50,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 09:47:50,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:47:50,953 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) [2019-09-07 09:47:50,975 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:47:51,022 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 09:47:51,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:47:51,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:47:51,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:47:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 09:47:51,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:47:51,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 09:47:51,045 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:47:51,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:47:51,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:47:51,046 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 7 states. [2019-09-07 09:47:51,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:47:51,129 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2019-09-07 09:47:51,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 09:47:51,129 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2019-09-07 09:47:51,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:47:51,130 INFO L225 Difference]: With dead ends: 71 [2019-09-07 09:47:51,130 INFO L226 Difference]: Without dead ends: 44 [2019-09-07 09:47:51,131 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:47:51,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-07 09:47:51,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-09-07 09:47:51,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-07 09:47:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2019-09-07 09:47:51,138 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 32 [2019-09-07 09:47:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:47:51,138 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2019-09-07 09:47:51,139 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:47:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2019-09-07 09:47:51,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-07 09:47:51,140 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:51,140 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:47:51,140 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:51,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:51,141 INFO L82 PathProgramCache]: Analyzing trace with hash -125121014, now seen corresponding path program 4 times [2019-09-07 09:47:51,141 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:51,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:51,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:51,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:47:51,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-09-07 09:47:51,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:47:51,275 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) [2019-09-07 09:47:51,304 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:47:51,340 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:47:51,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:47:51,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 09:47:51,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:47:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:47:51,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:47:51,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-07 09:47:51,370 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 09:47:51,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 09:47:51,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:47:51,370 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 8 states. [2019-09-07 09:47:51,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:47:51,445 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-09-07 09:47:51,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 09:47:51,446 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2019-09-07 09:47:51,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:47:51,447 INFO L225 Difference]: With dead ends: 80 [2019-09-07 09:47:51,447 INFO L226 Difference]: Without dead ends: 49 [2019-09-07 09:47:51,448 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:47:51,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-07 09:47:51,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2019-09-07 09:47:51,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-07 09:47:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2019-09-07 09:47:51,454 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 37 [2019-09-07 09:47:51,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:47:51,455 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2019-09-07 09:47:51,455 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 09:47:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2019-09-07 09:47:51,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-07 09:47:51,456 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:51,456 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:47:51,457 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:51,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:51,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1558523702, now seen corresponding path program 5 times [2019-09-07 09:47:51,457 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:51,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:51,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:51,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:47:51,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-09-07 09:47:51,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:47:51,557 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:47:51,578 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:47:51,872 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-07 09:47:51,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:47:51,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 09:47:51,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:47:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (6)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:47:51,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:47:51,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-07 09:47:51,898 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 09:47:51,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 09:47:51,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 09:47:51,899 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 9 states. [2019-09-07 09:47:52,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:47:52,004 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2019-09-07 09:47:52,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 09:47:52,005 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2019-09-07 09:47:52,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:47:52,006 INFO L225 Difference]: With dead ends: 89 [2019-09-07 09:47:52,006 INFO L226 Difference]: Without dead ends: 54 [2019-09-07 09:47:52,007 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 09:47:52,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-07 09:47:52,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2019-09-07 09:47:52,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-07 09:47:52,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2019-09-07 09:47:52,014 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 42 [2019-09-07 09:47:52,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:47:52,015 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2019-09-07 09:47:52,015 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 09:47:52,015 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2019-09-07 09:47:52,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-07 09:47:52,016 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:52,016 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:47:52,016 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:52,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:52,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1349350398, now seen corresponding path program 6 times [2019-09-07 09:47:52,017 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:52,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:52,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:52,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:47:52,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-09-07 09:47:52,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:47:52,154 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) [2019-09-07 09:47:52,179 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:47:52,442 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-07 09:47:52,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:47:52,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:47:52,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:47:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-09-07 09:47:52,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:47:52,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-07 09:47:52,491 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 09:47:52,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 09:47:52,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:47:52,492 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 10 states. [2019-09-07 09:47:52,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:47:52,587 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2019-09-07 09:47:52,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 09:47:52,588 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2019-09-07 09:47:52,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:47:52,590 INFO L225 Difference]: With dead ends: 98 [2019-09-07 09:47:52,590 INFO L226 Difference]: Without dead ends: 59 [2019-09-07 09:47:52,591 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:47:52,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-07 09:47:52,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-09-07 09:47:52,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-07 09:47:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2019-09-07 09:47:52,609 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 47 [2019-09-07 09:47:52,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:47:52,610 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2019-09-07 09:47:52,610 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 09:47:52,610 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2019-09-07 09:47:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-07 09:47:52,614 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:52,615 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:47:52,615 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:52,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:52,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1128841790, now seen corresponding path program 7 times [2019-09-07 09:47:52,617 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:52,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:52,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:52,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:47:52,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-09-07 09:47:52,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:47:52,790 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 [2019-09-07 09:47:52,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:47:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:52,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 09:47:52,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:47:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (8)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:47:52,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:47:52,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-07 09:47:52,894 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 09:47:52,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 09:47:52,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:47:52,895 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 11 states. [2019-09-07 09:47:53,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:47:53,000 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2019-09-07 09:47:53,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 09:47:53,001 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2019-09-07 09:47:53,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:47:53,002 INFO L225 Difference]: With dead ends: 107 [2019-09-07 09:47:53,002 INFO L226 Difference]: Without dead ends: 64 [2019-09-07 09:47:53,003 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:47:53,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-07 09:47:53,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-09-07 09:47:53,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-09-07 09:47:53,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2019-09-07 09:47:53,010 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 52 [2019-09-07 09:47:53,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:47:53,011 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2019-09-07 09:47:53,011 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 09:47:53,012 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2019-09-07 09:47:53,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-07 09:47:53,013 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:53,013 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:47:53,013 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:53,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:53,014 INFO L82 PathProgramCache]: Analyzing trace with hash -612503046, now seen corresponding path program 8 times [2019-09-07 09:47:53,014 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:53,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:53,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:53,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:47:53,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-09-07 09:47:53,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:47:53,162 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 [2019-09-07 09:47:53,183 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:47:53,222 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:47:53,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:47:53,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 09:47:53,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:47:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-09-07 09:47:53,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:47:53,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-07 09:47:53,272 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:47:53,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:47:53,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:47:53,273 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 12 states. [2019-09-07 09:47:53,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:47:53,393 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2019-09-07 09:47:53,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 09:47:53,396 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-09-07 09:47:53,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:47:53,397 INFO L225 Difference]: With dead ends: 116 [2019-09-07 09:47:53,398 INFO L226 Difference]: Without dead ends: 69 [2019-09-07 09:47:53,398 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:47:53,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-07 09:47:53,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2019-09-07 09:47:53,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-09-07 09:47:53,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2019-09-07 09:47:53,413 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 57 [2019-09-07 09:47:53,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:47:53,413 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2019-09-07 09:47:53,413 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:47:53,413 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2019-09-07 09:47:53,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-09-07 09:47:53,418 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:53,418 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:47:53,419 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:53,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:53,419 INFO L82 PathProgramCache]: Analyzing trace with hash -490630470, now seen corresponding path program 9 times [2019-09-07 09:47:53,419 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:53,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:53,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:53,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:47:53,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-09-07 09:47:53,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:47:53,591 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) [2019-09-07 09:47:53,610 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:47:53,968 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-07 09:47:53,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:47:53,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 09:47:53,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:47:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (10)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:47:54,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:47:54,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-07 09:47:54,007 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 09:47:54,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 09:47:54,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 09:47:54,008 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 13 states. [2019-09-07 09:47:54,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:47:54,130 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2019-09-07 09:47:54,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 09:47:54,131 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2019-09-07 09:47:54,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:47:54,132 INFO L225 Difference]: With dead ends: 125 [2019-09-07 09:47:54,132 INFO L226 Difference]: Without dead ends: 74 [2019-09-07 09:47:54,133 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 09:47:54,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-09-07 09:47:54,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2019-09-07 09:47:54,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-07 09:47:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2019-09-07 09:47:54,140 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 62 [2019-09-07 09:47:54,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:47:54,141 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2019-09-07 09:47:54,141 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 09:47:54,141 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2019-09-07 09:47:54,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-07 09:47:54,142 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:54,143 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:47:54,143 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:54,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:54,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1207107598, now seen corresponding path program 10 times [2019-09-07 09:47:54,143 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:54,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:54,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:54,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:47:54,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:54,271 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-09-07 09:47:54,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:47:54,272 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) [2019-09-07 09:47:54,294 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:47:54,333 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:47:54,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:47:54,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 09:47:54,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:47:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-09-07 09:47:54,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:47:54,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-07 09:47:54,369 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 09:47:54,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 09:47:54,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 09:47:54,370 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 14 states. [2019-09-07 09:47:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:47:54,496 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-09-07 09:47:54,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 09:47:54,496 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2019-09-07 09:47:54,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:47:54,497 INFO L225 Difference]: With dead ends: 134 [2019-09-07 09:47:54,497 INFO L226 Difference]: Without dead ends: 79 [2019-09-07 09:47:54,498 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 09:47:54,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-07 09:47:54,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-09-07 09:47:54,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-07 09:47:54,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2019-09-07 09:47:54,504 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 67 [2019-09-07 09:47:54,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:47:54,505 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2019-09-07 09:47:54,505 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 09:47:54,505 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2019-09-07 09:47:54,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-07 09:47:54,506 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:54,506 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:47:54,507 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:54,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:54,507 INFO L82 PathProgramCache]: Analyzing trace with hash 2083114930, now seen corresponding path program 11 times [2019-09-07 09:47:54,507 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:54,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:54,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:54,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:47:54,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2019-09-07 09:47:54,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:47:54,646 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) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:47:54,662 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:48:22,989 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-07 09:48:22,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:48:23,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 09:48:23,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:48:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-09-07 09:48:23,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:48:23,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 09:48:23,052 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:48:23,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:48:23,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:48:23,054 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 15 states. [2019-09-07 09:48:23,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:48:23,191 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2019-09-07 09:48:23,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 09:48:23,191 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 72 [2019-09-07 09:48:23,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:48:23,192 INFO L225 Difference]: With dead ends: 143 [2019-09-07 09:48:23,193 INFO L226 Difference]: Without dead ends: 84 [2019-09-07 09:48:23,194 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:48:23,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-07 09:48:23,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2019-09-07 09:48:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-09-07 09:48:23,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2019-09-07 09:48:23,211 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 72 [2019-09-07 09:48:23,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:48:23,211 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2019-09-07 09:48:23,211 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:48:23,212 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2019-09-07 09:48:23,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-09-07 09:48:23,215 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:48:23,215 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:48:23,215 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:48:23,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:48:23,216 INFO L82 PathProgramCache]: Analyzing trace with hash 385857002, now seen corresponding path program 12 times [2019-09-07 09:48:23,216 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:48:23,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:48:23,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:23,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:48:23,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-09-07 09:48:23,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:48:23,413 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 [2019-09-07 09:48:23,440 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:48:35,740 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-07 09:48:35,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:48:35,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-07 09:48:35,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:48:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 35 proven. 144 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-09-07 09:48:35,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:48:35,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 18 [2019-09-07 09:48:35,854 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-07 09:48:35,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-07 09:48:35,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 09:48:35,855 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 18 states. [2019-09-07 09:48:36,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:48:36,130 INFO L93 Difference]: Finished difference Result 155 states and 166 transitions. [2019-09-07 09:48:36,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 09:48:36,130 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2019-09-07 09:48:36,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:48:36,132 INFO L225 Difference]: With dead ends: 155 [2019-09-07 09:48:36,132 INFO L226 Difference]: Without dead ends: 92 [2019-09-07 09:48:36,133 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 09:48:36,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-09-07 09:48:36,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-09-07 09:48:36,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-07 09:48:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2019-09-07 09:48:36,139 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 77 [2019-09-07 09:48:36,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:48:36,140 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2019-09-07 09:48:36,140 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-07 09:48:36,140 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2019-09-07 09:48:36,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-07 09:48:36,141 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:48:36,141 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:48:36,141 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:48:36,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:48:36,142 INFO L82 PathProgramCache]: Analyzing trace with hash -535424030, now seen corresponding path program 13 times [2019-09-07 09:48:36,142 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:48:36,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:48:36,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:36,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:48:36,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-09-07 09:48:36,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:48:36,331 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 [2019-09-07 09:48:36,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:48:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:36,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 09:48:36,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:48:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (14)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:48:36,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:48:36,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-09-07 09:48:36,435 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-07 09:48:36,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-07 09:48:36,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 09:48:36,440 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 18 states. [2019-09-07 09:48:36,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:48:36,619 INFO L93 Difference]: Finished difference Result 170 states and 178 transitions. [2019-09-07 09:48:36,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 09:48:36,619 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2019-09-07 09:48:36,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:48:36,620 INFO L225 Difference]: With dead ends: 170 [2019-09-07 09:48:36,620 INFO L226 Difference]: Without dead ends: 99 [2019-09-07 09:48:36,621 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 09:48:36,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-07 09:48:36,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2019-09-07 09:48:36,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-09-07 09:48:36,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2019-09-07 09:48:36,628 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 87 [2019-09-07 09:48:36,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:48:36,628 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2019-09-07 09:48:36,628 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-07 09:48:36,629 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2019-09-07 09:48:36,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-09-07 09:48:36,630 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:48:36,630 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:48:36,630 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:48:36,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:48:36,631 INFO L82 PathProgramCache]: Analyzing trace with hash -422313566, now seen corresponding path program 14 times [2019-09-07 09:48:36,631 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:48:36,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:48:36,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:36,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:48:36,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-09-07 09:48:36,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:48:36,863 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 [2019-09-07 09:48:36,874 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:48:36,930 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:48:36,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:48:36,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 09:48:36,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:48:36,958 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-09-07 09:48:36,963 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:48:36,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-07 09:48:36,964 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 09:48:36,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 09:48:36,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:48:36,965 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 19 states. [2019-09-07 09:48:37,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:48:37,131 INFO L93 Difference]: Finished difference Result 179 states and 187 transitions. [2019-09-07 09:48:37,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 09:48:37,131 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 92 [2019-09-07 09:48:37,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:48:37,133 INFO L225 Difference]: With dead ends: 179 [2019-09-07 09:48:37,133 INFO L226 Difference]: Without dead ends: 104 [2019-09-07 09:48:37,134 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:48:37,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-07 09:48:37,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2019-09-07 09:48:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-07 09:48:37,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2019-09-07 09:48:37,140 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 92 [2019-09-07 09:48:37,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:48:37,140 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2019-09-07 09:48:37,141 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 09:48:37,141 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2019-09-07 09:48:37,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-07 09:48:37,142 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:48:37,142 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:48:37,142 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:48:37,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:48:37,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1861215782, now seen corresponding path program 15 times [2019-09-07 09:48:37,143 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:48:37,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:48:37,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:37,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:48:37,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2019-09-07 09:48:37,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:48:37,371 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 [2019-09-07 09:48:37,382 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:48:39,982 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-07 09:48:39,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:48:39,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:48:39,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:48:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2019-09-07 09:48:40,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:48:40,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 09:48:40,029 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 09:48:40,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 09:48:40,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:48:40,031 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand 20 states. [2019-09-07 09:48:40,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:48:40,205 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2019-09-07 09:48:40,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 09:48:40,205 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2019-09-07 09:48:40,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:48:40,206 INFO L225 Difference]: With dead ends: 188 [2019-09-07 09:48:40,206 INFO L226 Difference]: Without dead ends: 109 [2019-09-07 09:48:40,207 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:48:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-09-07 09:48:40,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2019-09-07 09:48:40,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-09-07 09:48:40,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2019-09-07 09:48:40,213 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 97 [2019-09-07 09:48:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:48:40,214 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2019-09-07 09:48:40,214 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 09:48:40,214 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2019-09-07 09:48:40,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-07 09:48:40,215 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:48:40,215 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:48:40,215 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:48:40,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:48:40,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1207301786, now seen corresponding path program 16 times [2019-09-07 09:48:40,216 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:48:40,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:48:40,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:40,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:48:40,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2019-09-07 09:48:40,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:48:40,440 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 [2019-09-07 09:48:40,460 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:48:40,513 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:48:40,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:48:40,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 09:48:40,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:48:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (17)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:48:40,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:48:40,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-09-07 09:48:40,566 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 09:48:40,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 09:48:40,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:48:40,567 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand 21 states. [2019-09-07 09:48:40,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:48:40,774 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2019-09-07 09:48:40,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 09:48:40,777 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 102 [2019-09-07 09:48:40,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:48:40,778 INFO L225 Difference]: With dead ends: 197 [2019-09-07 09:48:40,778 INFO L226 Difference]: Without dead ends: 114 [2019-09-07 09:48:40,779 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:48:40,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-09-07 09:48:40,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2019-09-07 09:48:40,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-09-07 09:48:40,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2019-09-07 09:48:40,786 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 102 [2019-09-07 09:48:40,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:48:40,786 INFO L475 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2019-09-07 09:48:40,787 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 09:48:40,787 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2019-09-07 09:48:40,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-07 09:48:40,788 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:48:40,788 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:48:40,788 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:48:40,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:48:40,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1112684590, now seen corresponding path program 17 times [2019-09-07 09:48:40,789 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:48:40,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:48:40,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:40,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:48:40,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2019-09-07 09:48:41,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:48:41,131 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 [2019-09-07 09:48:41,143 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:50:05,141 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-09-07 09:50:05,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:50:05,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 09:50:05,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:50:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-09-07 09:50:05,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:50:05,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-09-07 09:50:05,241 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 09:50:05,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 09:50:05,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:50:05,242 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand 22 states. [2019-09-07 09:50:05,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:50:05,455 INFO L93 Difference]: Finished difference Result 206 states and 214 transitions. [2019-09-07 09:50:05,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 09:50:05,456 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2019-09-07 09:50:05,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:50:05,457 INFO L225 Difference]: With dead ends: 206 [2019-09-07 09:50:05,457 INFO L226 Difference]: Without dead ends: 119 [2019-09-07 09:50:05,458 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:50:05,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-09-07 09:50:05,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2019-09-07 09:50:05,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-09-07 09:50:05,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2019-09-07 09:50:05,464 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 107 [2019-09-07 09:50:05,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:50:05,464 INFO L475 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2019-09-07 09:50:05,464 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 09:50:05,464 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2019-09-07 09:50:05,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-07 09:50:05,465 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:50:05,466 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:50:05,466 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:50:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:50:05,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1010160530, now seen corresponding path program 18 times [2019-09-07 09:50:05,466 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:50:05,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:50:05,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:05,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:50:05,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:50:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2019-09-07 09:50:05,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:50:05,755 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 [2019-09-07 09:50:05,767 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:51:40,219 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-09-07 09:51:40,219 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:51:40,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 09:51:40,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:51:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-09-07 09:51:40,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:51:40,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-07 09:51:40,306 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 09:51:40,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 09:51:40,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:51:40,307 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand 23 states. [2019-09-07 09:51:40,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:51:40,520 INFO L93 Difference]: Finished difference Result 215 states and 223 transitions. [2019-09-07 09:51:40,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 09:51:40,521 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 112 [2019-09-07 09:51:40,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:51:40,522 INFO L225 Difference]: With dead ends: 215 [2019-09-07 09:51:40,522 INFO L226 Difference]: Without dead ends: 124 [2019-09-07 09:51:40,523 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:51:40,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-09-07 09:51:40,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2019-09-07 09:51:40,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-09-07 09:51:40,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2019-09-07 09:51:40,528 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 112 [2019-09-07 09:51:40,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:51:40,528 INFO L475 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2019-09-07 09:51:40,528 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 09:51:40,529 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2019-09-07 09:51:40,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-09-07 09:51:40,530 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:51:40,530 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:51:40,530 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:51:40,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:51:40,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1884348982, now seen corresponding path program 19 times [2019-09-07 09:51:40,531 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:51:40,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:51:40,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:40,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:51:40,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2019-09-07 09:51:40,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:51:40,824 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 [2019-09-07 09:51:40,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:51:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:40,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 09:51:40,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:51:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2019-09-07 09:51:40,941 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:51:40,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-09-07 09:51:40,943 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 09:51:40,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 09:51:40,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 09:51:40,945 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand 24 states. [2019-09-07 09:51:41,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:51:41,176 INFO L93 Difference]: Finished difference Result 224 states and 232 transitions. [2019-09-07 09:51:41,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 09:51:41,176 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 117 [2019-09-07 09:51:41,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:51:41,178 INFO L225 Difference]: With dead ends: 224 [2019-09-07 09:51:41,178 INFO L226 Difference]: Without dead ends: 129 [2019-09-07 09:51:41,178 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 09:51:41,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-09-07 09:51:41,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2019-09-07 09:51:41,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-09-07 09:51:41,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2019-09-07 09:51:41,187 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 117 [2019-09-07 09:51:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:51:41,187 INFO L475 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2019-09-07 09:51:41,188 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 09:51:41,188 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2019-09-07 09:51:41,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-09-07 09:51:41,189 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:51:41,189 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:51:41,189 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:51:41,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:51:41,190 INFO L82 PathProgramCache]: Analyzing trace with hash -326920054, now seen corresponding path program 20 times [2019-09-07 09:51:41,190 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:51:41,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:51:41,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:41,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:51:41,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2019-09-07 09:51:41,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:51:41,497 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 [2019-09-07 09:51:41,524 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:51:41,579 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:51:41,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:51:41,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 09:51:41,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:51:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2019-09-07 09:51:41,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:51:41,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-07 09:51:41,608 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 09:51:41,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 09:51:41,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:51:41,609 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand 25 states. [2019-09-07 09:51:41,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:51:41,826 INFO L93 Difference]: Finished difference Result 233 states and 241 transitions. [2019-09-07 09:51:41,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-07 09:51:41,829 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 122 [2019-09-07 09:51:41,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:51:41,831 INFO L225 Difference]: With dead ends: 233 [2019-09-07 09:51:41,831 INFO L226 Difference]: Without dead ends: 134 [2019-09-07 09:51:41,832 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:51:41,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-09-07 09:51:41,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2019-09-07 09:51:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-09-07 09:51:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2019-09-07 09:51:41,837 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 122 [2019-09-07 09:51:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:51:41,837 INFO L475 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2019-09-07 09:51:41,838 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 09:51:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2019-09-07 09:51:41,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-09-07 09:51:41,839 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:51:41,839 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:51:41,839 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:51:41,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:51:41,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1188305858, now seen corresponding path program 21 times [2019-09-07 09:51:41,840 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:51:41,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:51:41,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:41,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:51:41,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2019-09-07 09:51:42,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:51:42,155 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 [2019-09-07 09:51:42,169 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:52:09,787 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 09:52:09,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:52:09,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 09:52:09,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:52:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2019-09-07 09:52:09,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:52:09,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-09-07 09:52:09,853 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 09:52:09,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 09:52:09,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 09:52:09,854 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand 26 states. [2019-09-07 09:52:10,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:52:10,111 INFO L93 Difference]: Finished difference Result 242 states and 250 transitions. [2019-09-07 09:52:10,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 09:52:10,116 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 127 [2019-09-07 09:52:10,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:52:10,117 INFO L225 Difference]: With dead ends: 242 [2019-09-07 09:52:10,117 INFO L226 Difference]: Without dead ends: 139 [2019-09-07 09:52:10,118 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 09:52:10,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-09-07 09:52:10,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2019-09-07 09:52:10,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-09-07 09:52:10,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2019-09-07 09:52:10,124 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 127 [2019-09-07 09:52:10,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:52:10,124 INFO L475 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2019-09-07 09:52:10,124 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 09:52:10,124 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2019-09-07 09:52:10,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-09-07 09:52:10,125 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:52:10,126 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:52:10,126 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:52:10,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:52:10,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1540310402, now seen corresponding path program 22 times [2019-09-07 09:52:10,126 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:52:10,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:52:10,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:10,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:52:10,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:52:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2019-09-07 09:52:10,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:52:10,548 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:52:10,568 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:52:10,630 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:52:10,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:52:10,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 09:52:10,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:52:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-09-07 09:52:10,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:52:10,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-09-07 09:52:10,681 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 09:52:10,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 09:52:10,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 09:52:10,692 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand 27 states. [2019-09-07 09:52:10,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:52:10,957 INFO L93 Difference]: Finished difference Result 251 states and 259 transitions. [2019-09-07 09:52:10,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 09:52:10,958 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2019-09-07 09:52:10,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:52:10,959 INFO L225 Difference]: With dead ends: 251 [2019-09-07 09:52:10,960 INFO L226 Difference]: Without dead ends: 144 [2019-09-07 09:52:10,961 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 09:52:10,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-09-07 09:52:10,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2019-09-07 09:52:10,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-09-07 09:52:10,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2019-09-07 09:52:10,969 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 132 [2019-09-07 09:52:10,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:52:10,969 INFO L475 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2019-09-07 09:52:10,970 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 09:52:10,970 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2019-09-07 09:52:10,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-07 09:52:10,972 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:52:10,972 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:52:10,972 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:52:10,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:52:10,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1193492038, now seen corresponding path program 23 times [2019-09-07 09:52:10,973 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:52:10,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:52:10,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:10,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:52:10,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:52:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2019-09-07 09:52:11,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:52:11,422 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:52:11,441 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:54:34,919 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-09-07 09:54:34,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:54:34,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 09:54:34,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:54:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-09-07 09:54:35,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:54:35,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-09-07 09:54:35,064 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 09:54:35,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 09:54:35,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 09:54:35,065 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand 28 states. [2019-09-07 09:54:35,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:54:35,343 INFO L93 Difference]: Finished difference Result 260 states and 268 transitions. [2019-09-07 09:54:35,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-07 09:54:35,344 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 137 [2019-09-07 09:54:35,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:54:35,346 INFO L225 Difference]: With dead ends: 260 [2019-09-07 09:54:35,346 INFO L226 Difference]: Without dead ends: 149 [2019-09-07 09:54:35,347 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 09:54:35,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-09-07 09:54:35,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2019-09-07 09:54:35,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-09-07 09:54:35,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2019-09-07 09:54:35,356 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 137 [2019-09-07 09:54:35,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:54:35,356 INFO L475 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2019-09-07 09:54:35,356 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 09:54:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2019-09-07 09:54:35,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-09-07 09:54:35,359 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:54:35,359 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:54:35,360 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:54:35,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:54:35,360 INFO L82 PathProgramCache]: Analyzing trace with hash -418850182, now seen corresponding path program 24 times [2019-09-07 09:54:35,361 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:54:35,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:54:35,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:35,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:54:35,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2019-09-07 09:54:36,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:54:36,008 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:54:36,026 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:57:16,830 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2019-09-07 09:57:16,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:57:16,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-07 09:57:16,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:57:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2019-09-07 09:57:16,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:57:16,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-09-07 09:57:16,950 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-07 09:57:16,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-07 09:57:16,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 09:57:16,951 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand 29 states. [2019-09-07 09:57:17,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:57:17,236 INFO L93 Difference]: Finished difference Result 269 states and 277 transitions. [2019-09-07 09:57:17,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 09:57:17,242 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 142 [2019-09-07 09:57:17,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:57:17,243 INFO L225 Difference]: With dead ends: 269 [2019-09-07 09:57:17,243 INFO L226 Difference]: Without dead ends: 154 [2019-09-07 09:57:17,244 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 09:57:17,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-09-07 09:57:17,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2019-09-07 09:57:17,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-09-07 09:57:17,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2019-09-07 09:57:17,250 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 142 [2019-09-07 09:57:17,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:57:17,250 INFO L475 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2019-09-07 09:57:17,250 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-07 09:57:17,251 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2019-09-07 09:57:17,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-09-07 09:57:17,252 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:57:17,252 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:57:17,252 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:57:17,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:57:17,253 INFO L82 PathProgramCache]: Analyzing trace with hash -779546702, now seen corresponding path program 25 times [2019-09-07 09:57:17,253 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:57:17,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:57:17,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:57:17,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:57:17,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:57:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:57:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2019-09-07 09:57:17,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:57:17,749 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:57:17,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:57:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:57:17,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 09:57:17,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:57:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2019-09-07 09:57:17,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:57:17,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-09-07 09:57:17,938 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 09:57:17,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 09:57:17,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 09:57:17,940 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand 30 states. [2019-09-07 09:57:18,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:57:18,252 INFO L93 Difference]: Finished difference Result 278 states and 286 transitions. [2019-09-07 09:57:18,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-07 09:57:18,252 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 147 [2019-09-07 09:57:18,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:57:18,253 INFO L225 Difference]: With dead ends: 278 [2019-09-07 09:57:18,254 INFO L226 Difference]: Without dead ends: 159 [2019-09-07 09:57:18,254 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 09:57:18,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-09-07 09:57:18,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2019-09-07 09:57:18,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-09-07 09:57:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2019-09-07 09:57:18,260 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 147 [2019-09-07 09:57:18,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:57:18,260 INFO L475 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2019-09-07 09:57:18,260 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 09:57:18,261 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2019-09-07 09:57:18,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-09-07 09:57:18,262 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:57:18,262 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:57:18,262 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:57:18,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:57:18,263 INFO L82 PathProgramCache]: Analyzing trace with hash -987736206, now seen corresponding path program 26 times [2019-09-07 09:57:18,263 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:57:18,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:57:18,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:57:18,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:57:18,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:57:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:57:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2019-09-07 09:57:18,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:57:18,862 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:57:18,897 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:57:19,020 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:57:19,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:57:19,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 09:57:19,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:57:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2019-09-07 09:57:19,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:57:19,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-09-07 09:57:19,098 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 09:57:19,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 09:57:19,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-09-07 09:57:19,099 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand 31 states. [2019-09-07 09:57:19,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:57:19,382 INFO L93 Difference]: Finished difference Result 287 states and 295 transitions. [2019-09-07 09:57:19,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-07 09:57:19,384 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 152 [2019-09-07 09:57:19,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:57:19,385 INFO L225 Difference]: With dead ends: 287 [2019-09-07 09:57:19,385 INFO L226 Difference]: Without dead ends: 164 [2019-09-07 09:57:19,386 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-09-07 09:57:19,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-09-07 09:57:19,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2019-09-07 09:57:19,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-09-07 09:57:19,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 165 transitions. [2019-09-07 09:57:19,392 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 165 transitions. Word has length 152 [2019-09-07 09:57:19,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:57:19,392 INFO L475 AbstractCegarLoop]: Abstraction has 162 states and 165 transitions. [2019-09-07 09:57:19,392 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 09:57:19,392 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 165 transitions. [2019-09-07 09:57:19,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-09-07 09:57:19,394 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:57:19,394 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:57:19,394 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:57:19,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:57:19,394 INFO L82 PathProgramCache]: Analyzing trace with hash 312018346, now seen corresponding path program 27 times [2019-09-07 09:57:19,395 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:57:19,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:57:19,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:57:19,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:57:19,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:57:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:57:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2019-09-07 09:57:19,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:57:19,932 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:57:19,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:58:17,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-09-07 09:58:17,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:58:17,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 09:58:17,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:58:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2019-09-07 09:58:17,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:58:17,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-09-07 09:58:17,151 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-07 09:58:17,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-07 09:58:17,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 09:58:17,152 INFO L87 Difference]: Start difference. First operand 162 states and 165 transitions. Second operand 32 states. [2019-09-07 09:58:17,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:58:17,434 INFO L93 Difference]: Finished difference Result 296 states and 304 transitions. [2019-09-07 09:58:17,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 09:58:17,434 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 157 [2019-09-07 09:58:17,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:58:17,436 INFO L225 Difference]: With dead ends: 296 [2019-09-07 09:58:17,436 INFO L226 Difference]: Without dead ends: 169 [2019-09-07 09:58:17,436 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 09:58:17,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-09-07 09:58:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2019-09-07 09:58:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-09-07 09:58:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2019-09-07 09:58:17,441 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 157 [2019-09-07 09:58:17,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:58:17,441 INFO L475 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2019-09-07 09:58:17,441 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-07 09:58:17,441 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2019-09-07 09:58:17,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-09-07 09:58:17,442 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:58:17,443 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:58:17,443 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:58:17,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:58:17,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2029667222, now seen corresponding path program 28 times [2019-09-07 09:58:17,443 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:58:17,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:58:17,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:58:17,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:58:17,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:58:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:58:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2019-09-07 09:58:18,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:58:18,072 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:58:18,093 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:58:18,226 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:58:18,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:58:18,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-07 09:58:18,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:58:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2019-09-07 09:58:18,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:58:18,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-09-07 09:58:18,288 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-07 09:58:18,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-07 09:58:18,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 09:58:18,289 INFO L87 Difference]: Start difference. First operand 167 states and 170 transitions. Second operand 33 states. [2019-09-07 09:58:18,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:58:18,591 INFO L93 Difference]: Finished difference Result 305 states and 313 transitions. [2019-09-07 09:58:18,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-07 09:58:18,592 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 162 [2019-09-07 09:58:18,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:58:18,593 INFO L225 Difference]: With dead ends: 305 [2019-09-07 09:58:18,594 INFO L226 Difference]: Without dead ends: 174 [2019-09-07 09:58:18,595 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 09:58:18,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-09-07 09:58:18,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2019-09-07 09:58:18,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-09-07 09:58:18,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 175 transitions. [2019-09-07 09:58:18,601 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 175 transitions. Word has length 162 [2019-09-07 09:58:18,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:58:18,602 INFO L475 AbstractCegarLoop]: Abstraction has 172 states and 175 transitions. [2019-09-07 09:58:18,602 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-07 09:58:18,602 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 175 transitions. [2019-09-07 09:58:18,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-09-07 09:58:18,603 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:58:18,603 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:58:18,603 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:58:18,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:58:18,604 INFO L82 PathProgramCache]: Analyzing trace with hash 332178338, now seen corresponding path program 29 times [2019-09-07 09:58:18,604 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:58:18,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:58:18,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:58:18,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:58:18,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:58:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:58:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2019-09-07 09:58:19,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:58:19,241 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:58:19,269 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:01:31,344 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-09-07 10:01:31,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:01:31,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 10:01:31,425 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:01:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2019-09-07 10:01:31,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:01:31,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-09-07 10:01:31,489 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-07 10:01:31,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-07 10:01:31,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 10:01:31,490 INFO L87 Difference]: Start difference. First operand 172 states and 175 transitions. Second operand 34 states. [2019-09-07 10:01:31,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:01:31,863 INFO L93 Difference]: Finished difference Result 314 states and 322 transitions. [2019-09-07 10:01:31,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-07 10:01:31,863 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 167 [2019-09-07 10:01:31,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:01:31,865 INFO L225 Difference]: With dead ends: 314 [2019-09-07 10:01:31,865 INFO L226 Difference]: Without dead ends: 179 [2019-09-07 10:01:31,867 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 10:01:31,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-09-07 10:01:31,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2019-09-07 10:01:31,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-09-07 10:01:31,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 180 transitions. [2019-09-07 10:01:31,875 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 180 transitions. Word has length 167 [2019-09-07 10:01:31,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:01:31,875 INFO L475 AbstractCegarLoop]: Abstraction has 177 states and 180 transitions. [2019-09-07 10:01:31,875 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-07 10:01:31,875 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 180 transitions. [2019-09-07 10:01:31,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-09-07 10:01:31,876 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:01:31,876 INFO L399 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:01:31,877 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:01:31,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:01:31,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1750529694, now seen corresponding path program 30 times [2019-09-07 10:01:31,878 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:01:31,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:01:31,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:01:31,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:01:31,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:01:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:01:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2418 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2019-09-07 10:01:32,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:01:32,452 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:01:32,467 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE